Require verified ID for every uploader. Charge a token amount say $1 for every upload. Only accept uploads from countries with law enforcement that handles bad content and make it clear that law enforcement will be knocking on your door if you upload anything bad. Extend this to commenters.
This is just not a difficult problem, YouTube just doesn’t want to solve it
So not accepting content from the United States then? Bad content != illegal.
If they started with that YouTube wouldn't have gotten off the ground as people wouldn't go with the "unilaterally acts like they are being controlled by the Chinese Government" service.
I don't know specifically, but there must be something.