[YouTube] Fix extracting the detailed error message of streams which are unavailable

Author: TobiGr

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

@@ -943,7 +943,8 @@ private void checkPlayabilityStatus(final JsonObject youtubePlayerResponse,
             }
         }
 
-        if (status.equalsIgnoreCase("unplayable") && reason != null) {
+        if ((status.equalsIgnoreCase("unplayable") || status.equalsIgnoreCase("error"))
+                && reason != null) {
             if (reason.contains("Music Premium")) {
                 throw new YoutubeMusicPremiumContentException();
             }