[mattmerr]

Does watching a video pause the timeout? If so, hypothetically one could stream or locally create a video with no contents but long duration.

[davely]

Ah, that's an interesting point. I haven't tried to correlate that, but it must be true. For example, the screensaver never seems to appear during Zoom calls!

[Izkata]

That might also be implemented as "don't start the screensaver if the camera is in use". Easy to detect in either /proc/ or /sys/, I forget which one I was fiddling with.

[hunter2_]

Nah, I know people who use Zoom for this purpose without the camera enabled. It's just Zoom invoking the OS's wake lock.