How to stop laptop from turning off display when watching videos in Windows 11?

I have Dell Latitude 5330. I bought it 1 year ago. It has Windows 11 Pro OS on it. The BIOS, graphics driver and OS are the latest. When I bought the laptop I could watch any videos like youtube, vlc etc in full screen mode without the laptop turning the display off even though the setting for turning the display off was set to 5 minutes. It never used to turn the display off because I was watching in full screen mode but recently the laptop display is off after 5 minutes even in full screen mode. I searched everywhere for solutions but I can't find any. I read that it might be due to the Grap

Question by JJV on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.