Kids and Youtube

Does anyone else have kids that are obsessed with watching other kids play with toys on YouTube? 

Miss Eva (age 7) has had an obsession for years with a few different kids channels. She loves HobbyKidsTV, Ryan's Toy Mobile & Crafty Kitchen. Like she knows their entire life story! 

Just recently she has started asking about what subscribing means and having interest in her own channel. How do you know when it is safe? Like I am by no means a extremely strict parent and obviously she has access to YouTube on her Ipad. She is so responsible that I don't really have to worry about what she is watching because I now know their voices on the different shows. 

She has such an amazing imagination and can literally make a five star restaurant in her mind with her Minnie mouse kitchen. I honestly think it will also help with her self confidence and not to mention it will give us some one on one time with just me and her and something that can be "our thing." 

I would love to hear from anyone whose kids have a channel/show and how do you control it? How do you know that what you are doing is okay? 

P.s. if your kids haven't watched Hobbykidstv, they are absolutely amazing!!!! Go check them out! https://www.youtube.com/user/HobbyKidsTV