This misses the point for me.
Firstly, you can find quite horrible content all over the Internet. So if an under age individual wants to find pornographic, drugs related or Manchester United content, it is there unless blocked. And even if blocked it can surely be found one way or another.
For me on YouTube it is not the video as much as the comments that need to be looked at. The countless racist, bigoted, hate filled diatribes are not well policed by YouTube. And there are links back to the YouTube pages of the authors of the quotes. Well, if you want to hook up with a neo-Nazi it is not too hard.
Some of the YouTube pages for users are truly shocking and frightening and if in print form in the UK would surely be flagged up and dealt with, or you would hope so.
While “saving the children”, why not just save everyone from individuals exploiting YouTube’s blind spot?