I've found the opposite. These days I absolutely can't play a video in YouTube, it always comes back as not available. But I can use JDownloader to grab it unless there are language issues. (It unfortunately might not get the right language for the audio.)
JDownloader is also having issues:
https://board.jdownloader.org/showthread.php?t=48894&page=16...
but it seems like YT have various rules for when they do and don't trigger bans. Also this is a new change which they usually roll out experimentally, and per client at that. So the question is only how aggressive do they want to be. They can definitely detect JDownloader as a bot, and do.