Why does the Youtube App go black screen after a few minutes in full screen?

[Android Central Question]

So ever since I got my new phone, a Samung Galaxy Sky J7, I've had an issue with the Youtube app. It will work fine if not in full screen but obviously I can't see anything very well but if I try to full screen it, the screen will go black after a couple minutes. I've looked around and force stopping the app, uninstalling it, deleting twitter, all of that doesn't work. I've had this issue for months and don't know how to fix it please help.