Fix for requested changes.

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java

@@ -215,12 +215,11 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
             contents.remove(index);
         }
 
-        String jsonKey = contents.getObject(0).has("commentThreadRenderer") ? "commentThreadRenderer" : "commentRenderer";
+        final String jsonKey = contents.getObject(0).has("commentThreadRenderer") ? "commentThreadRenderer" : "commentRenderer";
 
         final List<Object> comments;
         try {
-            comments = JsonUtils.getValues(contents,
-                    jsonKey);
+            comments = JsonUtils.getValues(contents, jsonKey);
         } catch (final Exception e) {
             throw new ParsingException("Unable to get parse youtube comments", e);
         }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java

@@ -250,7 +250,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
             final String id = JsonUtils.getString(JsonUtils.getArray(json, "replies.commentRepliesRenderer.contents").getObject(0), "continuationItemRenderer.continuationEndpoint.continuationCommand.token");
             return new Page(url, id);
         } catch (final Exception e) {
-            return null;
+            return null; // Would return null for Comment Replies, since YouTube does not support nested replies.
         }
     }
 }