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It would be way smaller and with real content, instead of crappy slop (AI or otherwise).

[permo-w]

It would be dead. Google would shut it down or sell it, but who is going to buy billions of dollars a year in costs for no advertising revenue in return? Youtube's hosting costs would put a massive dent in even some hypothetical really nice billionaire's wallet. Apple could afford it and they'd run it a million times better, but would they even consider putting so much loss on their books for the sake of ... PR?

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A subscription based YouTube dead? That makes no sense. And a YouTube without terabytes of slop would be way easier to maintain.