I dont recognise that it is so easy to apply these limits, even though I work in tech. When trying to block through Windows, I get lost in a dark patterns maze of microsoft online family accounts, where I ended up with corrupt windows user accounts - I could no longer log into my own admin account with my written down paasword, and had to reinstall windows. When I try google/android instead, I end up with account/app limits that my child can easily circumvent just by watching videos through the browser instead. What I currently have resorted to doing, is dns blacklisting youtube through the router, and then using alternate DNS where youtube should work.

and this is not even to block my kid from youtube, it is just to keep her usage under/at 1 hour per day. meanwhile I have to fight with her misguided mother, who considers giving her a smartphone (she is 8, sigh). I am strongly against giving them to kids, given that not even adults can handle them responsibly.