Update YoutubeCommentsExtractor for live chat pages

Author: Ecomont

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

@@ -208,6 +208,10 @@ private Page getNextPage(final String continuation) throws ParsingException {
     public InfoItemsPage<CommentsInfoItem> getPage(final Page page)
             throws IOException, ExtractionException {
 
+        if (commentsDisabled && liveChatContinuation != null) {
+            return fetchLiveChat(page.getId());
+        }
+
         if (commentsDisabled) {
             return getInfoItemsPageForDisabledComments();
         }
@@ -497,6 +501,11 @@ public boolean isCommentsDisabled() {
         return commentsDisabled && liveChatContinuation == null;
     }
 
+    @Override
+    public boolean isLiveChat() {
+        return liveChatContinuation != null;
+    }
+
     @Override
     public int getCommentsCount() throws ExtractionException {
         assertPageFetched();