Most of those channels you mention aren't really teaching anything beyond general knowledge and trivia.

You could watch every video on every one of those channels and you might know a lot of random facts but it won't make you a physicist or a mathematician or a biologist.

>That's a parenting issue not a computer issue. Teach your kids what's allowed and what's not, and check their browser history until they learn how to manipulate it, then check your router logs

Ambulance at the bottom of the cliff. There are things I saw on the internet as a child that I still cannot unsee. My parents having seen that I saw them afterwards would not have changed that.