YT Kids (the app at least) has a setting where only videos and channels are allowed that are whitelisted by the parent. We used to limit it to stuff from BBC Cb

YT Kids (the app at least) has a setting where only videos and channels are allowed that are whitelisted by the parent. We used to limit it to stuff from BBC Cbeebies, Numberblocks & Alphablocks, Sesame Street, Disney, and similar stuff in their own language and in English. I think nowadays we just limit it to the age restrictions (<=4, 5-8, 9-12), so they don't see stuff that gives them nightmares. Everything else can be taken care of with the time limit.