My experience with YouTube is different. I get a decent mix of indie filmmaking advice and screenwriting tips, engineering, Russia-Ukraine updates, britcom and infotainment, cute animals. I did not do any special "training", it's all organic (apart from me clicking "do not recommend this channel ever again" from time to time).

I dislike YouTube but not as much as TikTok. One makes you choose what to watch, but the other has no long-form content whatsoever. One of is motivated by greed, but the other is backed by CCP.