avoid to dim screen when watching video in chrome

[Dude]

When watching a video from google chrome, after a while the screen dims and then turns off

How to avoid this without using the hardcode power saving settings on the steam deck?
I want the system to understand that the video is being viewed in the browser and not darken the screen

[Twice in a Blue Moon]

A year later.. Same problem here. Firefox playing YouTube video = display going to sleep. Yes can manually stop dimming but it should be a given that the OS should parse a video is being watched and temporarily not dim screen on its own like Windows and other distros do

Edit: problem is with Firefox, Chrome is not sleeping the screen