I just gave my 11 year old niece who lives with me a phone, she has an app on her phone (TIK TOK w/ musical.ly) What exactly is it? I looked it up but I am still not sure. Do the short videos travel all over the world? Can anyone see them and talk to her about them? With everything going on I get a little worried. She has been with me since she was in kindergarten and I worry. Can anyone tell me if this app is okay? Thanks guys