I assume you are referring to kids bypassing censorship - short of surveillance, this will be impossible. If the child chooses to access this content, that's not really stoppable. But we can prevent kids from being exposed to unsafe content
accidentally by curating content available to them.
The problem is, platfrom rules prevent unsafe content from being posted and watched by anyone, not just children. And that's concerning, because YouTube is the defacto public utility for video hosting in all but semantics, just like Twitter and Facebook are the defacto "digital town square" type services.