I'm honestly not sure we're in the trough. The value of Youtube is pretty tightly correlated to the amount of content on Youtube. While you could argue that the signal to noise ratio is worse, it's very hard to argue that there isn't significantly more 'good' (however you define it) content on youtube that makes it more valuable.

I find paying for Youtube premium an pretty great value, because it has some of the best content for any hobby I may be into. It doesn't have the pure depth of hard core educational content like udemy/coursera/khan has, but I'm really not able to consume that type of content enough to run out.