Add message for when chapters are auto generated

src/invidious/videos.cr

@@ -238,6 +238,10 @@ struct Video
     return @chapters
   end
 
+  def automatically_generated_chapters? : Bool?
+    return @info["AutoGeneratedChapters"]?.try &.as_bool
+  end
+
   def hls_manifest_url : String?
     info.dig?("streamingData", "hlsManifestUrl").try &.as_s
   end

src/invidious/videos/parser.cr

@@ -392,13 +392,25 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
 
   # Chapters
   chapters_array = [] of JSON::Any
+  chapters_auto_generated = nil
 
-  # Yes, `decoratedPlayerBarRenderer` is repeated twice.
+  # Yes,`decoratedPlayerBarRenderer` is repeated twice.
   if player_bar = player_overlays.try &.dig?("decoratedPlayerBarRenderer", "decoratedPlayerBarRenderer", "playerBar")
     if markers = player_bar.dig?("multiMarkersPlayerBarRenderer", "markersMap")
       potential_chapters_array = markers.as_a.find { |m| m["key"]? == "DESCRIPTION_CHAPTERS" }
 
+      # Let manual chapters have higher precedence than automatically generated ones.
+      if !potential_chapters_array
+        potential_chapters_array = markers.as_a.find { |m| m["key"]? == "AUTO_CHAPTERS" }
+      end
+
       if potential_chapters_array
+        if potential_chapters_array["key"] == "AUTO_CHAPTERS"
+          chapters_auto_generated = true
+        else
+          chapters_auto_generated = false
+        end
+
         chapters_array = potential_chapters_array["value"]["chapters"].as_a
       end
     end
@@ -450,7 +462,8 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
     "authorVerified"  => JSON::Any.new(author_verified || false),
     "subCountText"    => JSON::Any.new(subs_text || "-"),
 
-    "chapters" => JSON::Any.new(chapters_array),
+    "AutoGeneratedChapters" => JSON::Any.new(chapters_auto_generated),
+    "chapters"              => JSON::Any.new(chapters_array),
   }
 
   return params

src/invidious/views/components/description_chapters_widget.ecr

@@ -2,6 +2,11 @@
     <div class="description-chapters-section">
         <hr class="description-content-separator"/>
         <h4>Chapters</h4>
+
+        <% if video.automatically_generated_chapters? %> 
+          <h5>Chapters are automatically generated </h5>
+        <% end %>
+
         <div class="description-chapters-content-container">
             <% chapters.each do | chapter | %>
                 <%- start_in_seconds = chapter.start_ms.milliseconds.total_seconds.to_i %>