YouTube does use machine learning / some form of AI, although it prefers maximum viewing time over quality so is choaking channels like Veritasium, and promoting stuff that's basically endless streams of clickbait. Wouldn't surprise me if it did a shitty job with music too. One YouTuber I watch has opened a vid.me
account due to, I think, getting demonetized automatically by the AI, and I hope more follow. YouTube really sucks these days.