Mark live chat pages with live_chat identifier

Author: Ecomont

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

@@ -208,7 +208,8 @@ private Page getNextPage(final String continuation) throws ParsingException {
     public InfoItemsPage<CommentsInfoItem> getPage(final Page page)
             throws IOException, ExtractionException {
 
-        if (commentsDisabled && liveChatContinuation != null) {
+        if ("live_chat".equals(page.getUrl())
+                || (commentsDisabled && liveChatContinuation != null)) {
             return fetchLiveChat(page.getId());
         }
 
@@ -484,7 +485,7 @@ private InfoItemsPage<CommentsInfoItem> extractLiveChatComments(
                     nextCont = contObj.getObject("liveChatReplayContinuationData")
                             .getString("continuation");
                 }
-                nextPage = nextCont != null ? new Page(getUrl(), nextCont) : null;
+                nextPage = nextCont != null ? new Page("live_chat", nextCont) : null;
             } else {
                 nextPage = null;
             }