I hate Ryan's world I don't like the mom her voice is very squeaky and annoying. The videos and very bad. I also think Ryan is old enough to move on from his channel (if he wants). He also needs to be doing other things as well because he is only 11, and his parents expose him.
I have banned my nieces out from watching him and other shows like A for adley, Blippi, Diana, and Ryan's world. These are annoying channels and I have managed with her grandma who lives with her family to stop these videos including her parents. My grandma also said these videos are cheap and don't teach anything.
We ended up banning those channels and allowing her to watch quality made shows in a studio like Bubble Guppies, Peep and Chirp, Peppa Pig, Bear in the big blue house, Sesame Street, Mr. Rodgers Neighborhood, Wiggles, Shawn the Sheep, Umizoomis and many more shows like these. These are good shows and some of them I grew up with. I was born in 2007.
If they refuse just take away the device and most times just allow them to play outside. Also sometimes YouTube has inappropriate "kid" videos so I would not allow my future kids with YouTube. (Unless its clean or has slime or fidgets)
I hope this helps have a good day! (: