I don't really understand why Youtube won't let me create a profile, on my paid family account that I'm paying $29 NZD a month for, which lets me whitelist channels. I'm happy for my kids to have free access to certain channels on youtube, but the mind numbing shorts, and shit they find on random channels just does my head in. And it seems to be getting worse, I'm not sure if its that they are getting older and able…
Have you tried creating a YouTube Kids profile? What you’re describing sounds like what they already have. It is not the default but there is a setting that allows you to create a list of allowed channels. The setting is called “Approved Content Only”.
While also containing huge amount of unboxing toys crap I would not give to my kids in my own watchiles.