Yes, it's the only video on the list that I've seen and it's exactly because my 2 and 4 year olds commandeer my iDevices and watch those videos. See this article about one woman making $5 million from reviewing Disney toys and you'll start to understand: http://www.buzzfeed.com/hillaryreinsberg/youtubes-biggest-st...
The linked article seemed to imply that because YT sees grown-up user info when kids use devices that belong to their parents, it will show grown-up commercials, e.g. Target and ATT. That would be worthless, since kids don't care and their parents don't see it.