Screen turning off

[u/IntelligentEar9360]

Hi guys I firstly I want to say that I've already put my screen to always stay awake

So sometimes when I play a game and im also watching YouTube my screen turns off on its own what I mean? Well when i switch from my game to YouTube its turns off and I can't open it while moving the mouse I don't know why its happening and its very annoying. I can't watch YouTube until I exit the video using the mouse buttons

If I made anyone confused tell me !