The biggest fear for me is YouTube changing direction and not wanting our content any more. That could happen and the more bad press YT gets the tighter and tighter their control of what is published will become, eventually I think all videos will be pre-approved before going live depending on the niche of course. Their AI will "watch" the video and then if suitable it goes out. I know they do that with monetisation already but I bet monetisation is just the first step with their AI. It may be developed upon and used for far more.