diff --git a/assets/js/community.js b/assets/js/community.js
index 4077f1cd..44066a58 100644
--- a/assets/js/community.js
+++ b/assets/js/community.js
@@ -1,19 +1,20 @@
-var community_data = JSON.parse(document.getElementById('community_data').innerHTML);
+'use strict';
+var community_data = JSON.parse(document.getElementById('community_data').textContent);
 
 String.prototype.supplant = function (o) {
     return this.replace(/{([^{}]*)}/g, function (a, b) {
         var r = o[b];
         return typeof r === 'string' || typeof r === 'number' ? r : a;
     });
-}
+};
 
 function hide_youtube_replies(event) {
     var target = event.target;
 
-    sub_text = target.getAttribute('data-inner-text');
-    inner_text = target.getAttribute('data-sub-text');
+    var sub_text = target.getAttribute('data-inner-text');
+    var inner_text = target.getAttribute('data-sub-text');
 
-    body = target.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.children[1];
     body.style.display = 'none';
 
     target.innerHTML = sub_text;
@@ -25,10 +26,10 @@ function hide_youtube_replies(event) {
 function show_youtube_replies(event) {
     var target = event.target;
 
-    sub_text = target.getAttribute('data-inner-text');
-    inner_text = target.getAttribute('data-sub-text');
+    var sub_text = target.getAttribute('data-inner-text');
+    var inner_text = target.getAttribute('data-sub-text');
 
-    body = target.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.children[1];
     body.style.display = '';
 
     target.innerHTML = sub_text;
@@ -63,8 +64,8 @@ function get_youtube_replies(target, load_more) {
     xhr.open('GET', url, true);
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 if (load_more) {
                     body = body.parentNode.parentNode;
                     body.removeChild(body.lastElementChild);
@@ -92,12 +93,12 @@ function get_youtube_replies(target, load_more) {
                 body.innerHTML = fallback;
             }
         }
-    }
+    };
 
     xhr.ontimeout = function () {
-        console.log('Pulling comments failed.');
+        console.warn('Pulling comments failed.');
         body.innerHTML = fallback;
-    }
+    };
 
     xhr.send();
 }
diff --git a/assets/js/embed.js b/assets/js/embed.js
index 9d0be0ea..7e9ac605 100644
--- a/assets/js/embed.js
+++ b/assets/js/embed.js
@@ -1,19 +1,21 @@
-var video_data = JSON.parse(document.getElementById('video_data').innerHTML);
+'use strict';
+var video_data = JSON.parse(document.getElementById('video_data').textContent);
 
 function get_playlist(plid, retries) {
-    if (retries == undefined) retries = 5;
+    if (retries === undefined) retries = 5;
 
     if (retries <= 0) {
-        console.log('Failed to pull playlist');
+        console.warn('Failed to pull playlist');
         return;
     }
 
+    var plid_url;
     if (plid.startsWith('RD')) {
-        var plid_url = '/api/v1/mixes/' + plid +
+        plid_url = '/api/v1/mixes/' + plid +
             '?continuation=' + video_data.id +
             '&format=html&hl=' + video_data.preferences.locale;
     } else {
-        var plid_url = '/api/v1/playlists/' + plid +
+        plid_url = '/api/v1/playlists/' + plid +
             '?index=' + video_data.index +
             '&continuation' + video_data.id +
             '&format=html&hl=' + video_data.preferences.locale;
@@ -57,17 +59,17 @@ function get_playlist(plid, retries) {
                 }
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
-        console.log('Pulling playlist failed... ' + retries + '/5');
-        setTimeout(function () { get_playlist(plid, retries - 1) }, 1000);
-    }
+        console.warn('Pulling playlist failed... ' + retries + '/5');
+        setTimeout(function () { get_playlist(plid, retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
-        console.log('Pulling playlist failed... ' + retries + '/5');
+        console.warn('Pulling playlist failed... ' + retries + '/5');
         get_playlist(plid, retries - 1);
-    }
+    };
 
     xhr.send();
 }
@@ -96,7 +98,7 @@ window.addEventListener('load', function (e) {
             }
 
             if (video_data.video_series.length !== 0) {
-                url.searchParams.set('playlist', video_data.video_series.join(','))
+                url.searchParams.set('playlist', video_data.video_series.join(','));
             }
 
             location.assign(url.pathname + url.search);
diff --git a/assets/js/handlers.js b/assets/js/handlers.js
index 02175957..3224e668 100644
--- a/assets/js/handlers.js
+++ b/assets/js/handlers.js
@@ -76,7 +76,7 @@
     });
 
     n2a(document.querySelectorAll('[data-onrange="update_volume_value"]')).forEach(function (e) {
-        var cb = function () { update_volume_value(e); }
+        var cb = function () { update_volume_value(e); };
         e.oninput = cb;
         e.onchange = cb;
     });
@@ -102,13 +102,13 @@
         xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
         xhr.onreadystatechange = function () {
-            if (xhr.readyState == 4) {
-                if (xhr.status != 200) {
+            if (xhr.readyState === 4) {
+                if (xhr.status !== 200) {
                     count.innerText = parseInt(count.innerText) + 1;
                     row.style.display = '';
                 }
             }
-        }
+        };
 
         var csrf_token = target.parentNode.querySelector('input[name="csrf_token"]').value;
         xhr.send('csrf_token=' + csrf_token);
@@ -131,20 +131,20 @@
         xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
         xhr.onreadystatechange = function () {
-            if (xhr.readyState == 4) {
-                if (xhr.status != 200) {
+            if (xhr.readyState === 4) {
+                if (xhr.status !== 200) {
                     count.innerText = parseInt(count.innerText) + 1;
                     row.style.display = '';
                 }
             }
-        }
+        };
 
         var csrf_token = target.parentNode.querySelector('input[name="csrf_token"]').value;
         xhr.send('csrf_token=' + csrf_token);
     }
 
     // Handle keypresses
-    window.addEventListener('keydown', (event) => {
+    window.addEventListener('keydown', function (event) {
         // Ignore modifier keys
         if (event.ctrlKey || event.metaKey) return;
 
@@ -152,14 +152,14 @@
         let focused_tag = document.activeElement.tagName.toLowerCase();
         const allowed = /^(button|checkbox|file|radio|submit)$/;
 
-        if (focused_tag === "textarea") return;
-        if (focused_tag === "input") {
+        if (focused_tag === 'textarea') return;
+        if (focused_tag === 'input') {
             let focused_type = document.activeElement.type.toLowerCase();
             if (!focused_type.match(allowed)) return;
         }
 
         // Focus search bar on '/'
-        if (event.key == "/") {
+        if (event.key === '/') {
             document.getElementById('searchbox').focus();
             event.preventDefault();
         }
diff --git a/assets/js/notifications.js b/assets/js/notifications.js
index 3d1ec1ed..ec5f6dd3 100644
--- a/assets/js/notifications.js
+++ b/assets/js/notifications.js
@@ -1,9 +1,10 @@
-var notification_data = JSON.parse(document.getElementById('notification_data').innerHTML);
+'use strict';
+var notification_data = JSON.parse(document.getElementById('notification_data').textContent);
 
 var notifications, delivered;
 
 function get_subscriptions(callback, retries) {
-    if (retries == undefined) retries = 5;
+    if (retries === undefined) retries = 5;
 
     if (retries <= 0) {
         return;
@@ -17,21 +18,21 @@ function get_subscriptions(callback, retries) {
     xhr.onreadystatechange = function () {
         if (xhr.readyState === 4) {
             if (xhr.status === 200) {
-                subscriptions = xhr.response;
+                var subscriptions = xhr.response;
                 callback(subscriptions);
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
-        console.log('Pulling subscriptions failed... ' + retries + '/5');
-        setTimeout(function () { get_subscriptions(callback, retries - 1) }, 1000);
-    }
+        console.warn('Pulling subscriptions failed... ' + retries + '/5');
+        setTimeout(function () { get_subscriptions(callback, retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
-        console.log('Pulling subscriptions failed... ' + retries + '/5');
+        console.warn('Pulling subscriptions failed... ' + retries + '/5');
         get_subscriptions(callback, retries - 1);
-    }
+    };
 
     xhr.send();
 }
@@ -40,7 +41,7 @@ function create_notification_stream(subscriptions) {
     notifications = new SSE(
         '/api/v1/auth/notifications?fields=videoId,title,author,authorId,publishedText,published,authorThumbnails,liveNow', {
             withCredentials: true,
-            payload: 'topics=' + subscriptions.map(function (subscription) { return subscription.authorId }).join(','),
+            payload: 'topics=' + subscriptions.map(function (subscription) { return subscription.authorId; }).join(','),
             headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
         });
     delivered = [];
@@ -53,7 +54,7 @@ function create_notification_stream(subscriptions) {
         }
 
         var notification = JSON.parse(event.data);
-        console.log('Got notification:', notification);
+        console.info('Got notification:', notification);
 
         if (start_time < notification.published && !delivered.includes(notification.videoId)) {
             if (Notification.permission === 'granted') {
@@ -67,7 +68,7 @@ function create_notification_stream(subscriptions) {
 
                 system_notification.onclick = function (event) {
                     window.open('/watch?v=' + event.currentTarget.tag, '_blank');
-                }
+                };
             }
 
             delivered.push(notification.videoId);
@@ -82,16 +83,16 @@ function create_notification_stream(subscriptions) {
                     '<i class="icon ion-ios-notifications-outline"></i>';
             }
         }
-    }
+    };
 
     notifications.addEventListener('error', handle_notification_error);
     notifications.stream();
 }
 
 function handle_notification_error(event) {
-    console.log('Something went wrong with notifications, trying to reconnect...');
+    console.warn('Something went wrong with notifications, trying to reconnect...');
     notifications = { close: function () { } };
-    setTimeout(function () { get_subscriptions(create_notification_stream) }, 1000);
+    setTimeout(function () { get_subscriptions(create_notification_stream); }, 1000);
 }
 
 window.addEventListener('load', function (e) {
diff --git a/assets/js/player.js b/assets/js/player.js
index f5bec651..6ddb1158 100644
--- a/assets/js/player.js
+++ b/assets/js/player.js
@@ -1,5 +1,6 @@
-var player_data = JSON.parse(document.getElementById('player_data').innerHTML);
-var video_data = JSON.parse(document.getElementById('video_data').innerHTML);
+'use strict';
+var player_data = JSON.parse(document.getElementById('player_data').textContent);
+var video_data = JSON.parse(document.getElementById('video_data').textContent);
 
 var options = {
     preload: 'auto',
@@ -27,7 +28,7 @@ var options = {
             overrideNative: true
         }
     }
-}
+};
 
 if (player_data.aspect_ratio) {
     options.aspectRatio = player_data.aspect_ratio;
@@ -38,7 +39,7 @@ embed_url.searchParams.delete('v');
 var short_url = location.origin + '/' + video_data.id + embed_url.search;
 embed_url = location.origin + '/embed/' + video_data.id + embed_url.search;
 
-var save_player_pos_key = "save_player_pos";
+var save_player_pos_key = 'save_player_pos';
 
 videojs.Vhs.xhr.beforeRequest = function(options) {
     if (options.uri.indexOf('videoplayback') === -1 && options.uri.indexOf('local=true') === -1) {
@@ -111,12 +112,12 @@ var shareOptions = {
     description: player_data.description,
     image: player_data.thumbnail,
     get embedCode() {
-        return "<iframe id='ivplayer' width='640' height='360' src='" +
-            addCurrentTimeToURL(embed_url) + "' style='border:none;'></iframe>";
+        return '<iframe id="ivplayer" width="640" height="360" src="' +
+            addCurrentTimeToURL(embed_url) + '" style="border:none;"></iframe>';
     }
 };
 
-const storage = (() => {
+const storage = (function () {
     try { if (localStorage.length !== -1) return localStorage; }
     catch (e) { console.info('No storage available: ' + e); }
 
@@ -137,57 +138,57 @@ if (location.pathname.startsWith('/embed/')) {
 // Detection code taken from https://stackoverflow.com/a/20293441
 
 function isMobile() {
-  try{ document.createEvent("TouchEvent"); return true; }
+  try{ document.createEvent('TouchEvent'); return true; }
   catch(e){ return false; }
 }
 
 if (isMobile()) {
     player.mobileUi();
 
-    buttons = ["playToggle", "volumePanel", "captionsButton"];
+    var buttons = ['playToggle', 'volumePanel', 'captionsButton'];
 
-    if (video_data.params.quality !== 'dash') buttons.push("qualitySelector")
+    if (video_data.params.quality !== 'dash') buttons.push('qualitySelector');
 
     // Create new control bar object for operation buttons
-    const ControlBar = videojs.getComponent("controlBar");
+    const ControlBar = videojs.getComponent('controlBar');
     let operations_bar = new ControlBar(player, {
       children: [],
       playbackRates: [0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0]
     });
-    buttons.slice(1).forEach(child => operations_bar.addChild(child))
+    buttons.slice(1).forEach(function (child) {operations_bar.addChild(child);});
 
     // Remove operation buttons from primary control bar
-    primary_control_bar = player.getChild("controlBar");
-    buttons.forEach(child => primary_control_bar.removeChild(child));
+    var primary_control_bar = player.getChild('controlBar');
+    buttons.forEach(function (child) {primary_control_bar.removeChild(child);});
 
-    operations_bar_element = operations_bar.el();
-    operations_bar_element.className += " mobile-operations-bar"
-    player.addChild(operations_bar)
+    var operations_bar_element = operations_bar.el();
+    operations_bar_element.className += ' mobile-operations-bar';
+    player.addChild(operations_bar);
 
     // Playback menu doesn't work when it's initialized outside of the primary control bar
-    playback_element = document.getElementsByClassName("vjs-playback-rate")[0]
-    operations_bar_element.append(playback_element)
+    var playback_element = document.getElementsByClassName('vjs-playback-rate')[0];
+    operations_bar_element.append(playback_element);
 
     // The share and http source selector element can't be fetched till the players ready.
-    player.one("playing", () => {
-  	    share_element = document.getElementsByClassName("vjs-share-control")[0]
-  	    operations_bar_element.append(share_element)
+    player.one('playing', function () {
+        var share_element = document.getElementsByClassName('vjs-share-control')[0];
+        operations_bar_element.append(share_element);
 
-  	    if (video_data.params.quality === 'dash') {
-        		http_source_selector = document.getElementsByClassName("vjs-http-source-selector vjs-menu-button")[0]
-        		operations_bar_element.append(http_source_selector)
-  	    }
-  	})
+        if (video_data.params.quality === 'dash') {
+                var http_source_selector = document.getElementsByClassName('vjs-http-source-selector vjs-menu-button')[0];
+                operations_bar_element.append(http_source_selector);
+        }
+    });
 }
 
 // Enable VR video support
 if (!video_data.params.listen && video_data.vr && video_data.params.vr_mode) {
-    player.crossOrigin("anonymous")
+    player.crossOrigin('anonymous');
     switch (video_data.projection_type) {
-        case "EQUIRECTANGULAR":
-            player.vr({projection: "equirectangular"});
-        default: // Should only be "MESH" but we'll use this as a fallback.
-            player.vr({projection: "EAC"});
+        case 'EQUIRECTANGULAR':
+            player.vr({projection: 'equirectangular'});
+        default: // Should only be 'MESH' but we'll use this as a fallback.
+            player.vr({projection: 'EAC'});
     }
 }
 
@@ -222,27 +223,27 @@ player.playbackRate(video_data.params.speed);
  * @returns cookieValue
  */
 function getCookieValue(name) {
-    var value = document.cookie.split(";").filter(item => item.includes(name + "="));
+    var value = document.cookie.split(';').filter(function (item) {return item.includes(name + '=');});
 
-    return (value != null && value.length >= 1)
-        ? value[0].substring((name + "=").length, value[0].length)
+    return (value.length >= 1)
+        ? value[0].substring((name + '=').length, value[0].length)
         : null;
 }
 
 /**
- * Method for updating the "PREFS" cookie (or creating it if missing)
+ * Method for updating the 'PREFS' cookie (or creating it if missing)
  *
  * @param {number} newVolume New volume defined (null if unchanged)
  * @param {number} newSpeed New speed defined (null if unchanged)
  */
 function updateCookie(newVolume, newSpeed) {
-    var volumeValue = newVolume != null ? newVolume : video_data.params.volume;
-    var speedValue = newSpeed != null ? newSpeed : video_data.params.speed;
+    var volumeValue = newVolume !== null ? newVolume : video_data.params.volume;
+    var speedValue = newSpeed !== null ? newSpeed : video_data.params.speed;
 
     var cookieValue = getCookieValue('PREFS');
     var cookieData;
 
-    if (cookieValue != null) {
+    if (cookieValue !== null) {
         var cookieJson = JSON.parse(decodeURIComponent(cookieValue));
         cookieJson.volume = volumeValue;
         cookieJson.speed = speedValue;
@@ -259,7 +260,7 @@ function updateCookie(newVolume, newSpeed) {
     var domainUsed = window.location.hostname;
 
     // Fix for a bug in FF where the leading dot in the FQDN is not ignored
-    if (domainUsed.charAt(0) != '.' && !ipRegex.test(domainUsed) && domainUsed != 'localhost')
+    if (domainUsed.charAt(0) !== '.' && !ipRegex.test(domainUsed) && domainUsed !== 'localhost')
         domainUsed = '.' + window.location.hostname;
 
     document.cookie = 'PREFS=' + cookieData + '; SameSite=Strict; path=/; domain=' +
@@ -279,7 +280,7 @@ player.on('volumechange', function () {
 
 player.on('waiting', function () {
     if (player.playbackRate() > 1 && player.liveTracker.isLive() && player.liveTracker.atLiveEdge()) {
-        console.log('Player has caught up to source, resetting playbackRate.')
+        console.info('Player has caught up to source, resetting playbackRate.');
         player.playbackRate(1);
     }
 });
@@ -290,13 +291,13 @@ if (video_data.premiere_timestamp && Math.round(new Date() / 1000) < video_data.
 
 if (video_data.params.save_player_pos) {
     const url = new URL(location);
-    const hasTimeParam = url.searchParams.has("t");
+    const hasTimeParam = url.searchParams.has('t');
     const remeberedTime = get_video_time();
     let lastUpdated = 0;
 
     if(!hasTimeParam) set_seconds_after_start(remeberedTime);
 
-    const updateTime = () => {
+    const updateTime = function () {
         const raw = player.currentTime();
         const time = Math.floor(raw);
 
@@ -306,7 +307,7 @@ if (video_data.params.save_player_pos) {
         }
     };
 
-    player.on("timeupdate", updateTime);
+    player.on('timeupdate', updateTime);
 }
 else remove_all_video_times();
 
@@ -316,13 +317,13 @@ if (video_data.params.autoplay) {
 
     player.ready(function () {
         new Promise(function (resolve, reject) {
-            setTimeout(() => resolve(1), 1);
+            setTimeout(function () {resolve(1);}, 1);
         }).then(function (result) {
             var promise = player.play();
 
             if (promise !== undefined) {
-                promise.then(_ => {
-                }).catch(error => {
+                promise.then(function () {
+                }).catch(function (error) {
                     bpb.show();
                 });
             }
@@ -333,16 +334,16 @@ if (video_data.params.autoplay) {
 if (!video_data.params.listen && video_data.params.quality === 'dash') {
     player.httpSourceSelector();
 
-    if (video_data.params.quality_dash != "auto") {
-        player.ready(() => {
-            player.on("loadedmetadata", () => {
-                const qualityLevels = Array.from(player.qualityLevels()).sort((a, b) => a.height - b.height);
+    if (video_data.params.quality_dash !== 'auto') {
+        player.ready(function () {
+            player.on('loadedmetadata', function () {
+                const qualityLevels = Array.from(player.qualityLevels()).sort(function (a, b) {return a.height - b.height;});
                 let targetQualityLevel;
                 switch (video_data.params.quality_dash) {
-                    case "best":
+                    case 'best':
                         targetQualityLevel = qualityLevels.length - 1;
                         break;
-                    case "worst":
+                    case 'worst':
                         targetQualityLevel = 0;
                         break;
                     default:
@@ -356,7 +357,7 @@ if (!video_data.params.listen && video_data.params.quality === 'dash') {
                         }
                 }
                 for (let i = 0; i < qualityLevels.length; i++) {
-                    qualityLevels[i].enabled = (i == targetQualityLevel);
+                    qualityLevels[i].enabled = (i === targetQualityLevel);
                 }
             });
         });
@@ -390,10 +391,12 @@ if (!video_data.params.listen && video_data.params.annotations) {
                     }
                 }
             }
-        }
+        };
 
-        window.addEventListener('__ar_annotation_click', e => {
-            const { url, target, seconds } = e.detail;
+        window.addEventListener('__ar_annotation_click', function (e) {
+            const url = e.detail.url,
+                  target = e.detail.target,
+                  seconds = e.detail.seconds;
             var path = new URL(url);
 
             if (path.href.startsWith('https://www.youtube.com/watch?') && seconds) {
@@ -463,7 +466,7 @@ function get_video_time() {
 
         return timestamp || 0;
     }
-    catch {
+    catch (e) {
         return 0;
     }
 }
@@ -474,7 +477,7 @@ function set_all_video_times(times) {
             try {
                 storage.setItem(save_player_pos_key, JSON.stringify(times));
             } catch (e) {
-                console.debug('set_all_video_times: ' + e);
+                console.warn('set_all_video_times: ' + e);
             }
         } else {
             storage.removeItem(save_player_pos_key);
@@ -489,7 +492,7 @@ function get_all_video_times() {
             try {
                 return JSON.parse(raw);
             } catch (e) {
-                console.debug('get_all_video_times: ' + e);
+                console.warn('get_all_video_times: ' + e);
             }
         }
     }
@@ -583,7 +586,7 @@ function increase_playback_rate(steps) {
     player.playbackRate(options.playbackRates[newIndex]);
 }
 
-window.addEventListener('keydown', e => {
+window.addEventListener('keydown', function (e) {
     if (e.target.tagName.toLowerCase() === 'input') {
         // Ignore input when focus is on certain elements, e.g. form fields.
         return;
@@ -702,7 +705,7 @@ window.addEventListener('keydown', e => {
 
     var volumeHover = false;
     var volumeSelector = pEl.querySelector('.vjs-volume-menu-button') || pEl.querySelector('.vjs-volume-panel');
-    if (volumeSelector != null) {
+    if (volumeSelector !== null) {
         volumeSelector.onmouseover = function () { volumeHover = true; };
         volumeSelector.onmouseout = function () { volumeHover = false; };
     }
@@ -722,9 +725,9 @@ window.addEventListener('keydown', e => {
                     var delta = Math.max(-1, Math.min(1, (event.wheelDelta || -event.detail)));
                     event.preventDefault();
 
-                    if (delta == 1) {
+                    if (delta === 1) {
                         increase_volume(volumeStep);
-                    } else if (delta == -1) {
+                    } else if (delta === -1) {
                         increase_volume(-volumeStep);
                     }
                 }
@@ -733,7 +736,7 @@ window.addEventListener('keydown', e => {
     };
 
     player.on('mousewheel', mouseScroll);
-    player.on("DOMMouseScroll", mouseScroll);
+    player.on('DOMMouseScroll', mouseScroll);
 }());
 
 // Since videojs-share can sometimes be blocked, we defer it until last
@@ -743,13 +746,13 @@ if (player.share) {
 
 // show the preferred caption by default
 if (player_data.preferred_caption_found) {
-    player.ready(() => {
+    player.ready(function () {
         player.textTracks()[1].mode = 'showing';
     });
 }
 
 // Safari audio double duration fix
-if (navigator.vendor == "Apple Computer, Inc." && video_data.params.listen) {
+if (navigator.vendor === 'Apple Computer, Inc.' && video_data.params.listen) {
     player.on('loadedmetadata', function () {
         player.on('timeupdate', function () {
             if (player.remainingTime() < player.duration() / 2 && player.remainingTime() >= 2) {
@@ -760,18 +763,18 @@ if (navigator.vendor == "Apple Computer, Inc." && video_data.params.listen) {
 }
 
 // Watch on Invidious link
-if (window.location.pathname.startsWith("/embed/")) {
+if (window.location.pathname.startsWith('/embed/')) {
     const Button = videojs.getComponent('Button');
     let watch_on_invidious_button = new Button(player);
 
     // Create hyperlink for current instance
-    redirect_element = document.createElement("a");
-    redirect_element.setAttribute("href", `//${window.location.host}/watch?v=${window.location.pathname.replace("/embed/","")}`)
-    redirect_element.appendChild(document.createTextNode("Invidious"))
+    var redirect_element = document.createElement('a');
+    redirect_element.setAttribute('href', location.pathname.replace('/embed/', '/watch?v='));
+    redirect_element.appendChild(document.createTextNode('Invidious'));
 
-    watch_on_invidious_button.el().appendChild(redirect_element)
-    watch_on_invidious_button.addClass("watch-on-invidious")
+    watch_on_invidious_button.el().appendChild(redirect_element);
+    watch_on_invidious_button.addClass('watch-on-invidious');
 
-    cb = player.getChild('ControlBar')
-    cb.addChild(watch_on_invidious_button)
-};
+    var cb = player.getChild('ControlBar');
+    cb.addChild(watch_on_invidious_button);
+}
diff --git a/assets/js/playlist_widget.js b/assets/js/playlist_widget.js
index 0ec27859..c2565874 100644
--- a/assets/js/playlist_widget.js
+++ b/assets/js/playlist_widget.js
@@ -1,4 +1,5 @@
-var playlist_data = JSON.parse(document.getElementById('playlist_data').innerHTML);
+'use strict';
+var playlist_data = JSON.parse(document.getElementById('playlist_data').textContent);
 
 function add_playlist_video(target) {
     var select = target.parentNode.children[0].children[1];
@@ -14,12 +15,12 @@ function add_playlist_video(target) {
     xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 option.innerText = '✓' + option.innerText;
             }
         }
-    }
+    };
 
     xhr.send('csrf_token=' + playlist_data.csrf_token);
 }
@@ -38,12 +39,12 @@ function add_playlist_item(target) {
     xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 tile.style.display = '';
             }
         }
-    }
+    };
 
     xhr.send('csrf_token=' + playlist_data.csrf_token);
 }
@@ -62,12 +63,12 @@ function remove_playlist_item(target) {
     xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 tile.style.display = '';
             }
         }
-    }
+    };
 
     xhr.send('csrf_token=' + playlist_data.csrf_token);
-}
\ No newline at end of file
+}
diff --git a/assets/js/subscribe_widget.js b/assets/js/subscribe_widget.js
index 216c36fe..45ff5706 100644
--- a/assets/js/subscribe_widget.js
+++ b/assets/js/subscribe_widget.js
@@ -1,4 +1,5 @@
-var subscribe_data = JSON.parse(document.getElementById('subscribe_data').innerHTML);
+'use strict';
+var subscribe_data = JSON.parse(document.getElementById('subscribe_data').textContent);
 
 var subscribe_button = document.getElementById('subscribe');
 subscribe_button.parentNode['action'] = 'javascript:void(0)';
@@ -9,9 +10,11 @@ if (subscribe_button.getAttribute('data-type') === 'subscribe') {
     subscribe_button.onclick = unsubscribe;
 }
 
-function subscribe(retries = 5) {
+function subscribe(retries) {
+    if (retries === undefined) retries = 5;
+
     if (retries <= 0) {
-        console.log('Failed to subscribe.');
+        console.warn('Failed to subscribe.');
         return;
     }
 
@@ -28,30 +31,33 @@ function subscribe(retries = 5) {
     subscribe_button.innerHTML = '<b>' + subscribe_data.unsubscribe_text + ' | ' + subscribe_data.sub_count_text + '</b>';
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 subscribe_button.onclick = subscribe;
                 subscribe_button.innerHTML = fallback;
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
-        console.log('Subscribing failed... ' + retries + '/5');
-        setTimeout(function () { subscribe(retries - 1) }, 1000);
-    }
+        console.warn('Subscribing failed... ' + retries + '/5');
+        setTimeout(function () { subscribe(retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
-        console.log('Subscribing failed... ' + retries + '/5');
+        console.warn('Subscribing failed... ' + retries + '/5');
         subscribe(retries - 1);
-    }
+    };
 
     xhr.send('csrf_token=' + subscribe_data.csrf_token);
 }
 
-function unsubscribe(retries = 5) {
+function unsubscribe(retries) {
+    if (retries === undefined)
+        retries = 5;
+
     if (retries <= 0) {
-        console.log('Failed to subscribe');
+        console.warn('Failed to subscribe');
         return;
     }
 
@@ -68,23 +74,23 @@ function unsubscribe(retries = 5) {
     subscribe_button.innerHTML = '<b>' + subscribe_data.subscribe_text + ' | ' + subscribe_data.sub_count_text + '</b>';
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 subscribe_button.onclick = unsubscribe;
                 subscribe_button.innerHTML = fallback;
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
-        console.log('Unsubscribing failed... ' + retries + '/5');
-        setTimeout(function () { unsubscribe(retries - 1) }, 1000);
-    }
+        console.warn('Unsubscribing failed... ' + retries + '/5');
+        setTimeout(function () { unsubscribe(retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
-        console.log('Unsubscribing failed... ' + retries + '/5');
+        console.warn('Unsubscribing failed... ' + retries + '/5');
         unsubscribe(retries - 1);
-    }
+    };
 
     xhr.send('csrf_token=' + subscribe_data.csrf_token);
 }
diff --git a/assets/js/themes.js b/assets/js/themes.js
index 0214a7f0..3f503b38 100644
--- a/assets/js/themes.js
+++ b/assets/js/themes.js
@@ -1,8 +1,9 @@
+'use strict';
 var toggle_theme = document.getElementById('toggle_theme');
 toggle_theme.href = 'javascript:void(0);';
 
 toggle_theme.addEventListener('click', function () {
-    var dark_mode = document.body.classList.contains("light-theme");
+    var dark_mode = document.body.classList.contains('light-theme');
 
     var url = '/toggle_theme?redirect=false';
     var xhr = new XMLHttpRequest();
@@ -13,7 +14,7 @@ toggle_theme.addEventListener('click', function () {
     set_mode(dark_mode);
     try {
         window.localStorage.setItem('dark_mode', dark_mode ? 'dark' : 'light');
-    } catch {}
+    } catch (e) {}
 
     xhr.send();
 });
@@ -29,7 +30,7 @@ window.addEventListener('DOMContentLoaded', function () {
     try {
         // Update localStorage if dark mode preference changed on preferences page
         window.localStorage.setItem('dark_mode', dark_mode);
-    } catch {}
+    } catch (e) {}
     update_mode(dark_mode);
 });
 
@@ -46,11 +47,11 @@ function scheme_switch (e) {
     if (localStorage.getItem('dark_mode')) {
       return;
     }
-  } catch {}
+  } catch (exception) {}
   if (e.matches) {
-    if (e.media.includes("dark")) {
+    if (e.media.includes('dark')) {
       set_mode(true);
-    } else if (e.media.includes("light")) {
+    } else if (e.media.includes('light')) {
       set_mode(false);
     }
   }
@@ -77,15 +78,13 @@ function update_mode (mode) {
         // If preference for dark mode indicated
         set_mode(true);
     }
-	else if (mode === 'false' /* for backwards compatibility */ || mode === 'light') {
-		// If preference for light mode indicated
-		set_mode(false);
-	}
+    else if (mode === 'false' /* for backwards compatibility */ || mode === 'light') {
+        // If preference for light mode indicated
+        set_mode(false);
+    }
     else if (document.getElementById('dark_mode_pref').textContent === '' && window.matchMedia('(prefers-color-scheme: dark)').matches) {
         // If no preference indicated here and no preference indicated on the preferences page (backend), but the browser tells us that the operating system has a dark theme
         set_mode(true);
     }
     // else do nothing, falling back to the mode defined by the `dark_mode` preference on the preferences page (backend)
 }
-
-
diff --git a/assets/js/watch.js b/assets/js/watch.js
index 1579abf4..29d58be5 100644
--- a/assets/js/watch.js
+++ b/assets/js/watch.js
@@ -1,31 +1,32 @@
-var video_data = JSON.parse(document.getElementById('video_data').innerHTML);
+'use strict';
+var video_data = JSON.parse(document.getElementById('video_data').textContent);
 
 String.prototype.supplant = function (o) {
     return this.replace(/{([^{}]*)}/g, function (a, b) {
         var r = o[b];
         return typeof r === 'string' || typeof r === 'number' ? r : a;
     });
-}
+};
 
 function toggle_parent(target) {
-    body = target.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.children[1];
     if (body.style.display === null || body.style.display === '') {
-        target.innerHTML = '[ + ]';
+        target.textContent = '[ + ]';
         body.style.display = 'none';
     } else {
-        target.innerHTML = '[ - ]';
+        target.textContent = '[ − ]';
         body.style.display = '';
     }
 }
 
 function toggle_comments(event) {
     var target = event.target;
-    body = target.parentNode.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.parentNode.children[1];
     if (body.style.display === null || body.style.display === '') {
-        target.innerHTML = '[ + ]';
+        target.textContent = '[ + ]';
         body.style.display = 'none';
     } else {
-        target.innerHTML = '[ - ]';
+        target.textContent = '[ − ]';
         body.style.display = '';
     }
 }
@@ -43,13 +44,13 @@ function swap_comments(event) {
 function hide_youtube_replies(event) {
     var target = event.target;
 
-    sub_text = target.getAttribute('data-inner-text');
-    inner_text = target.getAttribute('data-sub-text');
+    var sub_text = target.getAttribute('data-inner-text');
+    var inner_text = target.getAttribute('data-sub-text');
 
-    body = target.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.children[1];
     body.style.display = 'none';
 
-    target.innerHTML = sub_text;
+    target.textContent = sub_text;
     target.onclick = show_youtube_replies;
     target.setAttribute('data-inner-text', inner_text);
     target.setAttribute('data-sub-text', sub_text);
@@ -58,13 +59,13 @@ function hide_youtube_replies(event) {
 function show_youtube_replies(event) {
     var target = event.target;
 
-    sub_text = target.getAttribute('data-inner-text');
-    inner_text = target.getAttribute('data-sub-text');
+    var sub_text = target.getAttribute('data-inner-text');
+    var inner_text = target.getAttribute('data-sub-text');
 
-    body = target.parentNode.parentNode.children[1];
+    var body = target.parentNode.parentNode.children[1];
     body.style.display = '';
 
-    target.innerHTML = sub_text;
+    target.textContent = sub_text;
     target.onclick = hide_youtube_replies;
     target.setAttribute('data-inner-text', inner_text);
     target.setAttribute('data-sub-text', sub_text);
@@ -116,25 +117,26 @@ function number_with_separator(val) {
 }
 
 function get_playlist(plid, retries) {
-    if (retries == undefined) retries = 5;
-    playlist = document.getElementById('playlist');
+    if (retries === undefined) retries = 5;
+    var playlist = document.getElementById('playlist');
 
     if (retries <= 0) {
-        console.log('Failed to pull playlist');
+        console.warn('Failed to pull playlist');
         playlist.innerHTML = '';
         return;
     }
 
     playlist.innerHTML = ' \
         <h3 style="text-align:center"><div class="loading"><i class="icon ion-ios-refresh"></i></div></h3> \
-        <hr>'
+        <hr>';
 
+    var plid_url;
     if (plid.startsWith('RD')) {
-        var plid_url = '/api/v1/mixes/' + plid +
+        plid_url = '/api/v1/mixes/' + plid +
             '?continuation=' + video_data.id +
             '&format=html&hl=' + video_data.preferences.locale;
     } else {
-        var plid_url = '/api/v1/playlists/' + plid +
+        plid_url = '/api/v1/playlists/' + plid +
             '?index=' + video_data.index +
             '&continuation=' + video_data.id +
             '&format=html&hl=' + video_data.preferences.locale;
@@ -146,8 +148,8 @@ function get_playlist(plid, retries) {
     xhr.open('GET', plid_url, true);
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 playlist.innerHTML = xhr.response.playlistHtml;
                 var nextVideo = document.getElementById(xhr.response.nextVideo);
                 nextVideo.parentNode.parentNode.scrollTop = nextVideo.offsetTop;
@@ -185,35 +187,35 @@ function get_playlist(plid, retries) {
                 document.getElementById('continue').style.display = '';
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
         playlist = document.getElementById('playlist');
         playlist.innerHTML =
             '<h3 style="text-align:center"><div class="loading"><i class="icon ion-ios-refresh"></i></div></h3><hr>';
 
-        console.log('Pulling playlist timed out... ' + retries + '/5');
-        setTimeout(function () { get_playlist(plid, retries - 1) }, 1000);
-    }
+        console.warn('Pulling playlist timed out... ' + retries + '/5');
+        setTimeout(function () { get_playlist(plid, retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
         playlist = document.getElementById('playlist');
         playlist.innerHTML =
             '<h3 style="text-align:center"><div class="loading"><i class="icon ion-ios-refresh"></i></div></h3><hr>';
 
-        console.log('Pulling playlist timed out... ' + retries + '/5');
+        console.warn('Pulling playlist timed out... ' + retries + '/5');
         get_playlist(plid, retries - 1);
-    }
+    };
 
     xhr.send();
 }
 
 function get_reddit_comments(retries) {
-    if (retries == undefined) retries = 5;
-    comments = document.getElementById('comments');
+    if (retries === undefined) retries = 5;
+    var comments = document.getElementById('comments');
 
     if (retries <= 0) {
-        console.log('Failed to pull comments');
+        console.warn('Failed to pull comments');
         comments.innerHTML = '';
         return;
     }
@@ -231,12 +233,12 @@ function get_reddit_comments(retries) {
     xhr.open('GET', url, true);
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 comments.innerHTML = ' \
                 <div> \
                     <h3> \
-                        <a href="javascript:void(0)">[ - ]</a> \
+                        <a href="javascript:void(0)">[ − ]</a> \
                         {title} \
                     </h3> \
                     <p> \
@@ -263,34 +265,34 @@ function get_reddit_comments(retries) {
                 comments.children[0].children[1].children[0].onclick = swap_comments;
             } else {
                 if (video_data.params.comments[1] === 'youtube') {
-                    console.log('Pulling comments failed... ' + retries + '/5');
-                    setTimeout(function () { get_youtube_comments(retries - 1) }, 1000);
+                    console.warn('Pulling comments failed... ' + retries + '/5');
+                    setTimeout(function () { get_youtube_comments(retries - 1); }, 1000);
                 } else {
                     comments.innerHTML = fallback;
                 }
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
-        console.log('Pulling comments failed... ' + retries + '/5');
-        setTimeout(function () { get_reddit_comments(retries - 1) }, 1000);
-    }
+        console.warn('Pulling comments failed... ' + retries + '/5');
+        setTimeout(function () { get_reddit_comments(retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
-        console.log('Pulling comments failed... ' + retries + '/5');
+        console.warn('Pulling comments failed... ' + retries + '/5');
         get_reddit_comments(retries - 1);
-    }
+    };
 
     xhr.send();
 }
 
 function get_youtube_comments(retries) {
-    if (retries == undefined) retries = 5;
-    comments = document.getElementById('comments');
+    if (retries === undefined) retries = 5;
+    var comments = document.getElementById('comments');
 
     if (retries <= 0) {
-        console.log('Failed to pull comments');
+        console.warn('Failed to pull comments');
         comments.innerHTML = '';
         return;
     }
@@ -309,12 +311,12 @@ function get_youtube_comments(retries) {
     xhr.open('GET', url, true);
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 comments.innerHTML = ' \
                 <div> \
                     <h3> \
-                        <a href="javascript:void(0)">[ - ]</a> \
+                        <a href="javascript:void(0)">[ − ]</a> \
                         {commentsText}  \
                     </h3> \
                     <b> \
@@ -336,27 +338,27 @@ function get_youtube_comments(retries) {
                 comments.children[0].children[1].children[0].onclick = swap_comments;
             } else {
                 if (video_data.params.comments[1] === 'youtube') {
-                    setTimeout(function () { get_youtube_comments(retries - 1) }, 1000);
+                    setTimeout(function () { get_youtube_comments(retries - 1); }, 1000);
                 } else {
                     comments.innerHTML = '';
                 }
             }
         }
-    }
+    };
 
     xhr.onerror = function () {
         comments.innerHTML =
             '<h3 style="text-align:center"><div class="loading"><i class="icon ion-ios-refresh"></i></div></h3>';
-        console.log('Pulling comments failed... ' + retries + '/5');
-        setTimeout(function () { get_youtube_comments(retries - 1) }, 1000);
-    }
+        console.warn('Pulling comments failed... ' + retries + '/5');
+        setTimeout(function () { get_youtube_comments(retries - 1); }, 1000);
+    };
 
     xhr.ontimeout = function () {
         comments.innerHTML =
             '<h3 style="text-align:center"><div class="loading"><i class="icon ion-ios-refresh"></i></div></h3>';
-        console.log('Pulling comments failed... ' + retries + '/5');
+        console.warn('Pulling comments failed... ' + retries + '/5');
         get_youtube_comments(retries - 1);
-    }
+    };
 
     xhr.send();
 }
@@ -373,7 +375,7 @@ function get_youtube_replies(target, load_more, load_replies) {
         '?format=html' +
         '&hl=' + video_data.preferences.locale +
         '&thin_mode=' + video_data.preferences.thin_mode +
-        '&continuation=' + continuation
+        '&continuation=' + continuation;
     if (load_replies) {
         url += '&action=action_get_comment_replies';
     }
@@ -383,8 +385,8 @@ function get_youtube_replies(target, load_more, load_replies) {
     xhr.open('GET', url, true);
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status == 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
                 if (load_more) {
                     body = body.parentNode.parentNode;
                     body.removeChild(body.lastElementChild);
@@ -412,12 +414,12 @@ function get_youtube_replies(target, load_more, load_replies) {
                 body.innerHTML = fallback;
             }
         }
-    }
+    };
 
     xhr.ontimeout = function () {
-        console.log('Pulling comments failed.');
+        console.warn('Pulling comments failed.');
         body.innerHTML = fallback;
-    }
+    };
 
     xhr.send();
 }
@@ -461,7 +463,7 @@ window.addEventListener('load', function (e) {
     } else if (video_data.params.comments[1] === 'reddit') {
         get_reddit_comments();
     } else {
-        comments = document.getElementById('comments');
+        var comments = document.getElementById('comments');
         comments.innerHTML = '';
     }
 });
diff --git a/assets/js/watched_widget.js b/assets/js/watched_widget.js
index ba741974..87989a79 100644
--- a/assets/js/watched_widget.js
+++ b/assets/js/watched_widget.js
@@ -1,4 +1,5 @@
-var watched_data = JSON.parse(document.getElementById('watched_data').innerHTML);
+'use strict';
+var watched_data = JSON.parse(document.getElementById('watched_data').textContent);
 
 function mark_watched(target) {
     var tile = target.parentNode.parentNode.parentNode.parentNode.parentNode;
@@ -13,12 +14,12 @@ function mark_watched(target) {
     xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 tile.style.display = '';
             }
         }
-    }
+    };
 
     xhr.send('csrf_token=' + watched_data.csrf_token);
 }
@@ -26,7 +27,7 @@ function mark_watched(target) {
 function mark_unwatched(target) {
     var tile = target.parentNode.parentNode.parentNode.parentNode.parentNode;
     tile.style.display = 'none';
-    var count = document.getElementById('count')
+    var count = document.getElementById('count');
     count.innerText = count.innerText - 1;
 
     var url = '/watch_ajax?action_mark_unwatched=1&redirect=false' +
@@ -38,13 +39,13 @@ function mark_unwatched(target) {
     xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 
     xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            if (xhr.status != 200) {
+        if (xhr.readyState === 4) {
+            if (xhr.status !== 200) {
                 count.innerText = count.innerText - 1 + 2;
                 tile.style.display = '';
             }
         }
-    }
+    };
 
     xhr.send('csrf_token=' + watched_data.csrf_token);
-}
\ No newline at end of file
+}