diff --git a/src/invidious.cr b/src/invidious.cr
index 1448c502e..55974e4a0 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -385,6 +385,8 @@ get "/" do |env|
     else
       templated "popular"
     end
+  else
+    templated "empty"
   end
 end
 
@@ -722,6 +724,7 @@ get "/embed/:id" do |env|
     end
 
     next env.redirect url
+  else nil # Continue
   end
 
   params = process_video_params(env.params.query, preferences)
@@ -1213,6 +1216,10 @@ post "/playlist_ajax" do |env|
         error_message = {"error" => "Playlist cannot have more than 500 videos"}.to_json
         next error_message
       end
+    else
+      error_message = {"error" => "Unsupported action #{action}"}.to_json
+      env.response.status_code = 400
+      next error_message
     end
 
     video_id = env.params.query["video_id"]
@@ -1253,6 +1260,10 @@ post "/playlist_ajax" do |env|
     PG_DB.exec("UPDATE playlists SET index = array_remove(index, $1), video_count = cardinality(index), updated = $2 WHERE id = $3", index, Time.utc, playlist_id)
   when "action_move_video_before"
     # TODO: Playlist stub
+  else
+    error_message = {"error" => "Unsupported action #{action}"}.to_json
+    env.response.status_code = 400
+    next error_message
   end
 
   if redirect
@@ -1547,7 +1558,7 @@ post "/login" do |env|
         case prompt_type
         when "TWO_STEP_VERIFICATION"
           prompt_type = 2
-        when "LOGIN_CHALLENGE"
+        else # "LOGIN_CHALLENGE"
           prompt_type = 4
         end
 
@@ -1840,7 +1851,7 @@ post "/login" do |env|
             env.response.status_code = 400
             next templated "error"
           end
-        when "text"
+        else # "text"
           answer = Digest::MD5.hexdigest(answer.downcase.strip)
 
           found_valid_captcha = false
@@ -2251,6 +2262,10 @@ post "/watch_ajax" do |env|
     end
   when "action_mark_unwatched"
     PG_DB.exec("UPDATE users SET watched = array_remove(watched, $1) WHERE email = $2", id, user.email)
+  else
+    error_message = {"error" => "Unsupported action #{action}"}.to_json
+    env.response.status_code = 400
+    next error_message
   end
 
   if redirect
@@ -2405,6 +2420,10 @@ post "/subscription_ajax" do |env|
     end
   when "action_remove_subscriptions"
     PG_DB.exec("UPDATE users SET feed_needs_update = true, subscriptions = array_remove(subscriptions, $1) WHERE email = $2", channel_id, email)
+  else
+    error_message = {"error" => "Unsupported action #{action}"}.to_json
+    env.response.status_code = 400
+    next error_message
   end
 
   if redirect
@@ -2559,6 +2578,7 @@ post "/data_control" do |env|
         next
       end
 
+      # TODO: Unify into single import based on content-type
       case part.name
       when "import_invidious"
         body = JSON.parse(body)
@@ -2645,6 +2665,7 @@ post "/data_control" do |env|
             end
           end
         end
+      else nil # Ignore
       end
     end
   end
@@ -2986,6 +3007,10 @@ post "/token_ajax" do |env|
   case action
   when .starts_with? "action_revoke_token"
     PG_DB.exec("DELETE FROM session_ids * WHERE id = $1 AND email = $2", session, user.email)
+  else
+    error_message = {"error" => "Unsupported action #{action}"}.to_json
+    env.response.status_code = 400
+    next error_message
   end
 
   if redirect
@@ -3280,6 +3305,7 @@ get "/feed/playlist/:plid" do |env|
         full_path = URI.parse(node[attribute.name]).full_path
         query_string_opt = full_path.starts_with?("/watch?v=") ? "&#{params}" : ""
         node[attribute.name] = "#{host_url}#{full_path}#{query_string_opt}"
+      else nil # Skip
       end
     end
   end
@@ -4037,7 +4063,7 @@ get "/api/v1/annotations/:id" do |env|
 
       cache_annotation(PG_DB, id, annotations)
     end
-  when "youtube"
+  else # "youtube"
     response = YT_POOL.client &.get("/annotations_invideo?video_id=#{id}")
 
     if response.status_code != 200
diff --git a/src/invidious/channels.cr b/src/invidious/channels.cr
index 35ef5df23..afc1528e5 100644
--- a/src/invidious/channels.cr
+++ b/src/invidious/channels.cr
@@ -412,6 +412,7 @@ def fetch_channel_playlists(ucid, author, auto_generated, continuation, sort_by)
       url += "&sort=da"
     when "newest", "newest_created"
       url += "&sort=dd"
+    else nil # Ignore
     end
 
     response = YT_POOL.client &.get(url)
@@ -469,6 +470,7 @@ def produce_channel_videos_url(ucid, page = 1, auto_generated = nil, sort_by = "
     object["80226972:embedded"]["3:base64"].as(Hash)["3:varint"] = 0x01_i64
   when "oldest"
     object["80226972:embedded"]["3:base64"].as(Hash)["3:varint"] = 0x02_i64
+  else nil # Ignore
   end
 
   object["80226972:embedded"]["3:string"] = Base64.urlsafe_encode(Protodec::Any.from_json(Protodec::Any.cast_json(object["80226972:embedded"]["3:base64"])))
@@ -513,6 +515,7 @@ def produce_channel_playlists_url(ucid, cursor, sort = "newest", auto_generated
       object["80226972:embedded"]["3:base64"].as(Hash)["3:varint"] = 3_i64
     when "last", "last_added"
       object["80226972:embedded"]["3:base64"].as(Hash)["3:varint"] = 4_i64
+    else nil # Ignore
     end
   end
 
diff --git a/src/invidious/comments.cr b/src/invidious/comments.cr
index 4a048d7ac..24564bb99 100644
--- a/src/invidious/comments.cr
+++ b/src/invidious/comments.cr
@@ -356,6 +356,7 @@ def template_youtube_comments(comments, locale, thin_mode)
               </div>
             </div>
           END_HTML
+        else nil # Ignore
         end
       end
 
@@ -609,6 +610,8 @@ def produce_comment_continuation(video_id, cursor = "", sort_by = "top")
     object["6:embedded"].as(Hash)["4:embedded"].as(Hash)["6:varint"] = 0_i64
   when "new", "newest"
     object["6:embedded"].as(Hash)["4:embedded"].as(Hash)["6:varint"] = 1_i64
+  else # top
+    object["6:embedded"].as(Hash)["4:embedded"].as(Hash)["6:varint"] = 0_i64
   end
 
   continuation = object.try { |i| Protodec::Any.cast_json(object) }
diff --git a/src/invidious/helpers/helpers.cr b/src/invidious/helpers/helpers.cr
index e168c55ef..96d147371 100644
--- a/src/invidious/helpers/helpers.cr
+++ b/src/invidious/helpers/helpers.cr
@@ -173,6 +173,8 @@ struct Config
         yaml.scalar "ipv4"
       when Socket::Family::INET6
         yaml.scalar "ipv6"
+      when Socket::Family::UNIX
+        raise "Invalid socket family #{value}"
       end
     end
 
@@ -223,6 +225,8 @@ struct Config
       else
         return false
       end
+    else
+      return false
     end
   end
 
@@ -520,9 +524,7 @@ def extract_shelf_items(nodeset, ucid = nil, author_name = nil)
 
     shelf.xpath_nodes(%q(.//ul[contains(@class, "yt-uix-shelfslider-list") or contains(@class, "expanded-shelf-content-list")]/li)).each do |child_node|
       type = child_node.xpath_node(%q(./div))
-      if !type
-        next
-      end
+      next if !type
 
       case type["class"]
       when .includes? "yt-lockup-video"
@@ -599,6 +601,8 @@ def extract_shelf_items(nodeset, ucid = nil, author_name = nil)
           videos: videos,
           thumbnail: playlist_thumbnail
         )
+      else
+        next # Skip
       end
     end
 
@@ -763,7 +767,7 @@ def create_notification_stream(env, config, kemal_config, decrypt_function, topi
         loop do
           time_span = [0, 0, 0, 0]
           time_span[rand(4)] = rand(30) + 5
-          published = Time.utc - Time::Span.new(time_span[0], time_span[1], time_span[2], time_span[3])
+          published = Time.utc - Time::Span.new(days: time_span[0], hours: time_span[1], minutes: time_span[2], seconds: time_span[3])
           video_id = TEST_IDS[rand(TEST_IDS.size)]
 
           video = get_video(video_id, PG_DB)
diff --git a/src/invidious/helpers/i18n.cr b/src/invidious/helpers/i18n.cr
index 4c9bb2d67..0faa2e329 100644
--- a/src/invidious/helpers/i18n.cr
+++ b/src/invidious/helpers/i18n.cr
@@ -24,6 +24,8 @@ def translate(locale : Hash(String, JSON::Any) | Nil, translation : String, text
       if !locale[translation].as_s.empty?
         translation = locale[translation].as_s
       end
+    else
+      raise "Invalid translation #{translation}"
     end
   end
 
diff --git a/src/invidious/helpers/tokens.cr b/src/invidious/helpers/tokens.cr
index 0b609e80f..39aae3674 100644
--- a/src/invidious/helpers/tokens.cr
+++ b/src/invidious/helpers/tokens.cr
@@ -43,15 +43,10 @@ def sign_token(key, hash)
   string_to_sign = [] of String
 
   hash.each do |key, value|
-    if key == "signature"
-      next
-    end
+    next if key == "signature"
 
-    if value.is_a?(JSON::Any)
-      case value
-      when .as_a?
-        value = value.as_a.map { |item| item.as_s }
-      end
+    if value.is_a?(JSON::Any) && value.as_a?
+      value = value.as_a.map { |i| i.as_s }
     end
 
     case value
diff --git a/src/invidious/helpers/utils.cr b/src/invidious/helpers/utils.cr
index d08928629..79a69cf90 100644
--- a/src/invidious/helpers/utils.cr
+++ b/src/invidious/helpers/utils.cr
@@ -100,7 +100,7 @@ end
 def decode_length_seconds(string)
   length_seconds = string.gsub(/[^0-9:]/, "").split(":").map &.to_i
   length_seconds = [0] * (3 - length_seconds.size) + length_seconds
-  length_seconds = Time::Span.new(length_seconds[0], length_seconds[1], length_seconds[2])
+  length_seconds = Time::Span.new hours: length_seconds[0], minutes: length_seconds[1], seconds: length_seconds[2]
   length_seconds = length_seconds.total_seconds.to_i
 
   return length_seconds
@@ -162,6 +162,7 @@ def decode_date(string : String)
     return Time.utc
   when "yesterday"
     return Time.utc - 1.day
+  else nil # Continue
   end
 
   # String matches format "20 hours ago", "4 months ago"...
diff --git a/src/invidious/search.cr b/src/invidious/search.cr
index 92996f758..e85216294 100644
--- a/src/invidious/search.cr
+++ b/src/invidious/search.cr
@@ -310,6 +310,7 @@ def produce_search_params(sort : String = "relevance", date : String = "", conte
     object["2:embedded"].as(Hash)["1:varint"] = 4_i64
   when "year"
     object["2:embedded"].as(Hash)["1:varint"] = 5_i64
+  else nil # Ignore
   end
 
   case content_type
@@ -334,6 +335,7 @@ def produce_search_params(sort : String = "relevance", date : String = "", conte
     object["2:embedded"].as(Hash)["3:varint"] = 1_i64
   when "long"
     object["2:embedded"].as(Hash)["3:varint"] = 2_i64
+  else nil # Ignore
   end
 
   features.each do |feature|
@@ -358,6 +360,7 @@ def produce_search_params(sort : String = "relevance", date : String = "", conte
       object["2:embedded"].as(Hash)["23:varint"] = 1_i64
     when "hdr"
       object["2:embedded"].as(Hash)["25:varint"] = 1_i64
+    else nil # Ignore
     end
   end
 
diff --git a/src/invidious/users.cr b/src/invidious/users.cr
index afb100f24..0aa94d824 100644
--- a/src/invidious/users.cr
+++ b/src/invidious/users.cr
@@ -350,6 +350,7 @@ def get_subscription_feed(db, user, max_results = 40, page = 1)
       notifications.sort_by! { |video| video.author }
     when "channel name - reverse"
       notifications.sort_by! { |video| video.author }.reverse!
+    else nil # Ignore
     end
   else
     if user.preferences.latest_only
@@ -398,6 +399,7 @@ def get_subscription_feed(db, user, max_results = 40, page = 1)
       videos.sort_by! { |video| video.author }
     when "channel name - reverse"
       videos.sort_by! { |video| video.author }.reverse!
+    else nil # Ignore
     end
 
     notifications = PG_DB.query_one("SELECT notifications FROM users WHERE email = $1", user.email, as: Array(String))
diff --git a/src/invidious/videos.cr b/src/invidious/videos.cr
index 1c7599f89..f9d3dc289 100644
--- a/src/invidious/videos.cr
+++ b/src/invidious/videos.cr
@@ -1250,6 +1250,7 @@ def fetch_video(id, region)
     genre_url = "/channel/UCfFyYRYslvuhwMDnx6KjUvw"
   when "Trailers"
     genre_url = "/channel/UClgRkhTL3_hImCAmdLfDE4g"
+  else nil # Ignore
   end
 
   license = html.xpath_node(%q(//h4[contains(text(),"License")]/parent::*/ul/li)).try &.content || ""
diff --git a/src/invidious/views/login.ecr b/src/invidious/views/login.ecr
index 59fa90e55..b6e8117b9 100644
--- a/src/invidious/views/login.ecr
+++ b/src/invidious/views/login.ecr
@@ -22,69 +22,6 @@
             <hr>
 
             <% case account_type when %>
-            <% when "invidious" %>
-                <form class="pure-form pure-form-stacked" action="/login?referer=<%= URI.encode_www_form(referer) %>&type=invidious" method="post">
-                    <fieldset>
-                        <% if email %>
-                            <input name="email" type="hidden" value="<%= email %>">
-                        <% else %>
-                            <label for="email"><%= translate(locale, "User ID") %> :</label>
-                            <input required class="pure-input-1" name="email" type="text" placeholder="<%= translate(locale, "User ID") %>">
-                        <% end %>
-
-                        <% if password %>
-                            <input name="password" type="hidden" value="<%= HTML.escape(password) %>">
-                        <% else %>
-                            <label for="password"><%= translate(locale, "Password") %> :</label>
-                            <input required class="pure-input-1" name="password" type="password" placeholder="<%= translate(locale, "Password") %>">
-                        <% end %>
-
-                        <% if captcha %>
-                            <% case captcha_type when %>
-                            <% when "image" %>
-                                <% captcha = captcha.not_nil! %>
-                                <img style="width:50%" src='<%= captcha[:question] %>'/>
-                                <% captcha[:tokens].each_with_index do |token, i| %>
-                                    <input type="hidden" name="token[<%= i %>]" value="<%= URI.encode_www_form(token) %>">
-                                <% end %>
-                                <input type="hidden" name="captcha_type" value="image">
-                                <label for="answer"><%= translate(locale, "Time (h:mm:ss):") %></label>
-                                <input type="text" name="answer" type="text" placeholder="h:mm:ss">
-                            <% when "text" %>
-                                <% captcha = captcha.not_nil! %>
-                                <% captcha[:tokens].each_with_index do |token, i| %>
-                                    <input type="hidden" name="token[<%= i %>]" value="<%= URI.encode_www_form(token) %>">
-                                <% end %>
-                                <input type="hidden" name="captcha_type" value="text">
-                                <label for="answer"><%= captcha[:question] %></label>
-                                <input type="text" name="answer" type="text" placeholder="<%= translate(locale, "Answer") %>">
-                            <% end %>
-
-                            <button type="submit" name="action" value="signin" class="pure-button pure-button-primary">
-                                <%= translate(locale, "Register") %>
-                            </button>
-
-                            <% case captcha_type when %>
-                            <% when "image" %>
-                                <label>
-                                    <button type="submit" name="change_type" class="pure-button pure-button-primary" value="text">
-                                        <%= translate(locale, "Text CAPTCHA") %>
-                                    </button>
-                                </label>
-                            <% when "text" %>
-                                <label>
-                                    <button type="submit" name="change_type" class="pure-button pure-button-primary" value="image">
-                                        <%= translate(locale, "Image CAPTCHA") %>
-                                    </button>
-                                </label>
-                            <% end %>
-                        <% else %>
-                            <button type="submit" name="action" value="signin" class="pure-button pure-button-primary">
-                                <%= translate(locale, "Sign In") %>/<%= translate(locale, "Register") %>
-                            </button>
-                        <% end %>
-                    </fieldset>
-                </form>
             <% when "google" %>
                 <form class="pure-form pure-form-stacked" action="/login?referer=<%= URI.encode_www_form(referer) %>&type=google" method="post">
                     <fieldset>
@@ -121,6 +58,69 @@
                         <button type="submit" class="pure-button pure-button-primary"><%= translate(locale, "Sign In") %></button>
                     </fieldset>
                 </form>
+            <% else # "invidious" %>
+                <form class="pure-form pure-form-stacked" action="/login?referer=<%= URI.encode_www_form(referer) %>&type=invidious" method="post">
+                    <fieldset>
+                        <% if email %>
+                            <input name="email" type="hidden" value="<%= email %>">
+                        <% else %>
+                            <label for="email"><%= translate(locale, "User ID") %> :</label>
+                            <input required class="pure-input-1" name="email" type="text" placeholder="<%= translate(locale, "User ID") %>">
+                        <% end %>
+
+                        <% if password %>
+                            <input name="password" type="hidden" value="<%= HTML.escape(password) %>">
+                        <% else %>
+                            <label for="password"><%= translate(locale, "Password") %> :</label>
+                            <input required class="pure-input-1" name="password" type="password" placeholder="<%= translate(locale, "Password") %>">
+                        <% end %>
+
+                        <% if captcha %>
+                            <% case captcha_type when %>
+                            <% when "image" %>
+                                <% captcha = captcha.not_nil! %>
+                                <img style="width:50%" src='<%= captcha[:question] %>'/>
+                                <% captcha[:tokens].each_with_index do |token, i| %>
+                                    <input type="hidden" name="token[<%= i %>]" value="<%= URI.encode_www_form(token) %>">
+                                <% end %>
+                                <input type="hidden" name="captcha_type" value="image">
+                                <label for="answer"><%= translate(locale, "Time (h:mm:ss):") %></label>
+                                <input type="text" name="answer" type="text" placeholder="h:mm:ss">
+                            <% else # "text" %>
+                                <% captcha = captcha.not_nil! %>
+                                <% captcha[:tokens].each_with_index do |token, i| %>
+                                    <input type="hidden" name="token[<%= i %>]" value="<%= URI.encode_www_form(token) %>">
+                                <% end %>
+                                <input type="hidden" name="captcha_type" value="text">
+                                <label for="answer"><%= captcha[:question] %></label>
+                                <input type="text" name="answer" type="text" placeholder="<%= translate(locale, "Answer") %>">
+                            <% end %>
+
+                            <button type="submit" name="action" value="signin" class="pure-button pure-button-primary">
+                                <%= translate(locale, "Register") %>
+                            </button>
+
+                            <% case captcha_type when %>
+                            <% when "image" %>
+                                <label>
+                                    <button type="submit" name="change_type" class="pure-button pure-button-primary" value="text">
+                                        <%= translate(locale, "Text CAPTCHA") %>
+                                    </button>
+                                </label>
+                            <% else # "text" %>
+                                <label>
+                                    <button type="submit" name="change_type" class="pure-button pure-button-primary" value="image">
+                                        <%= translate(locale, "Image CAPTCHA") %>
+                                    </button>
+                                </label>
+                            <% end %>
+                        <% else %>
+                            <button type="submit" name="action" value="signin" class="pure-button pure-button-primary">
+                                <%= translate(locale, "Sign In") %>/<%= translate(locale, "Register") %>
+                            </button>
+                        <% end %>
+                    </fieldset>
+                </form>
             <% end %>
         </div>
     </div>