I believe I heard and I have not investigated to be frank that about 85 "correction" youtube groups where asking youtube to have them somewhat upgraded , thus more money more "corrections".
I really have not investigated why youtube videos are taken down and what videos but if you ask me I think the videos that are taken down (except profound,sex,nudity videos) are the ones that might hurt rich peoples money, thus vs governmental that are actually vs governmental, medical vaccine videos etc.Now flat earthers won't cost someone money so,meh. Again haven't investigated.