The first video is blocked for me in YouTube and in an embed. They may have previously played but YouTube at times does remove the videos from a region or they are removed completely.
The problem we have with trying to auto-detect stalls is it can also auto-trigger skipping when a song takes a few moments to queue up normally. Catch-22 we are stuck in. YouTube doesn’t send an event to say that the song is removed/copyright protected, which is unfortunate.
We are brainstorming up some ideas on how to catch this but, it still may have a delay before the song is skipped by a few seconds to ensure that we aren’t accidentally skipping something.
Otherwise, waiting for upvotes in general on the feature I think at this point.