Sounds like that could easily be a Chrome extension, though?

Say, a whitelist for Youtube. In instances where Youtube recommendations fail, they'll just see a black thumbnail/ no text, and won't click it. If they do, can just block the playing of the video too. It will teach them skills with finding what they want online, etc, while you're at it.

I'm guessing this is modern ABC Kids too, because a decade or so ago, ABC Kids had some oddly dark stuff that's stuck with me for a while now...

Your way's probably sleeker, especially if it's hooked up to a NAS + XBMC or something of that sort, though :)