Even if the courts won't uphold the copyright, that doesn't prevent people from claiming your videos and initiating YouTube's copyright process against you. This is a recurring problem for people who upload their own original performances of public-domain compositions, particularly solo piano.

I don't think it's people deliberately seeking this stuff out. For whatever reason, the algorithms love recommending AI content, and I'm sure the numbers are juiced to some degree with bot farms.

Not that it still isn't depressing.