My kids watch a lot of Youtube, mostly videos of people playing video games
One thing that bothers me is the unregulated nature of the content, especially the ads they are forced to watch.
There is strict legislation surrounding the advertising (particularly at children) on television, yet it's quite shocking to see the branded content masquerading as user-generated material (like unboxing videos) and those commercials that play before videos too.
I was watching one the other day that basically told kids to pester parents for sugary cereal in the supermarket.
Another example is that advertising which has been banned from television is still available Youtube.
Like this Holden ute commercial that was deemed as showing unsafe driving.