Ironically I find that YouTube has the absolute best content. It's the only one with authentic people making quality stuff for exactly your niche.
That doesn't mean there isn't trash, and I suppose if tv series are your jam it's likely sub-par, but for me it's unmatched by light years.
It's got good content but also a massive amount of slop. You don't see much straight up AI generated video, but it's incredibly common to see youtubers just sitting there reading a ChatGPT script.