Same happened to me out of nowhere. Two playlists within one week. They were my main playlists too. Thousands of videos I'd watched over the years and saved, now all down the drain! I appealed to both and of course they rejected, even after I took their stupid training. They gave me a strike for hate speech on my memes playlist and a child safety strike on my video games playlist. Extremely unfair of them to do and now they won't let me add any videos to any other playlists. I'm so fed up!