Fix test

Author: Isira-Seneviratne

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

@@ -542,7 +542,7 @@ public List<Image> getUploaderAvatars() throws ParsingException {
 
     @Override
     public long getUploaderSubscriberCount() throws ParsingException {
-        final var videoOwnerRenderer = JsonUtils.getObject(videoSecondaryInfoRenderer,
+        final var videoOwnerRenderer = JsonUtils.getObject(getVideoSecondaryInfoRenderer(),
                 "owner.videoOwnerRenderer");
         final String subscriberCountText =
                 getTextFromObject(videoOwnerRenderer.getObject("subscriberCountText"))