I have a Dell S2415h monitor which comes with built in speakers in the monitor. I also have set the turn off monitor at 5 mins, and sleep at 15 mins. My problem is that when I view youtube videos more than 5 mins, the screen will turn off along with the built in speakers. Is there a way to prevent the screen and speakers from turning off for specific software? Next time I open a long youtube video, I don't want to move the mouse just to keep the PC awake.