I think Youtube is ok with AI generated content, so they should be for a few more years. Where they will encounter problems, is with copyrighted material. YT is strict with legal related matters and is notorious for taking down videos, and suspending/banning accounts. Once people are able to create their own content with AI, a lot would probably make fan versions of copyrighted IP. If they have difficulty uploading them in YT, they will have to find other websites, maybe a decentralized one that is difficult to control.