Add error message when comments are disabled

assets/css/default.css

@@ -816,3 +816,7 @@ h1, h2, h3, h4, h5, p,
 #download_widget {
     width: 100%;
 }
+
+#comments-turned-off-on-video-message > p, #comments-disabled-message > p {
+  text-align: center;
+}

assets/js/comments.js

@@ -53,6 +53,10 @@ function show_youtube_replies(event) {
 }
 
 function get_youtube_comments() {
+    if (!video_data.comments_enabled) {
+        return;
+    };
+
     var comments = document.getElementById('comments');
 
     var fallback = comments.innerHTML;

assets/js/watch.js

@@ -186,8 +186,5 @@ addEventListener('load', function (e) {
         get_youtube_comments();
     } else if (video_data.params.comments[1] === 'reddit') {
         get_reddit_comments();
-    } else {
-        var comments = document.getElementById('comments');
-        comments.innerHTML = '';
-    }
+    } 
 });