Merge 'Show message when comments are turned off'

From https://github.com/iv-org/invidious/pull/4051

src/invidious/videos.cr

@@ -196,6 +196,11 @@ struct Video
     info["invidiousCompanion"]?.try &.as_h || {} of String => JSON::Any
   end
 
+  # Returns true if comments are enabled on the video
+  def comments?
+    return info["commentsEnabled"].as_bool
+  end
+
   # Macros defining getters/setters for various types of data
 
   private macro getset_string(name)