This is very concerning, especially the part about channels being deleted out of nowhere. I had a big enough scare when my videos momentarily disappeared from my dashboard and I had to refresh to get them back up. Luckily, I have all my reviews backed up, and I'm not too bother if I lose the older vids on my channel.

What confused me is when he said he could still use custom thumbnails after one copyright strike. I got one (thank you, Toei) that was manually detected and I can't use custom thumbnails anymore, or monetize my videos. Don't know what else been taken away, but since I rarely make videos that are ten minutes long, the fifteen minute thing doesn't affect me right now. I also have several videos I can't monetize in the future, but that's mainly due to the copyright owners either having something set up, or manually searching for these things and flagging them.

I can't even see the comment page on that video, but that might be a problem on my end.