Perhaps it costs real money to submit each video to these platforms as a means to offset the moderation and rating efforts. Similar to what others have suggested to reduce spam emails.
Off the top of my head, requiring money to post videos to these platforms would immediately reduce the sheer huge volume of spam and automated/auto-generated videos. It would also reduce spam from LCOL regions that weaponize their low-value of time in order to game the system.
Not only that, but it would solve identity and age verification (as it'd require a credit card).
Easy to scale up nannying to infinite proportions with AGI. (We don't have that yet, but it may arrive very soon. Well, we have a shitty approximation right now, but AI != AGI.)
On the other hand, that (coupled with the NSA thing) also makes the "my FBI agent" meme come true. One Federal Agent Per Child.
(and of course how unworkable it would be to have the censor board be several percent of the population so they could keep up with the posting rate)