I've been playing around with OBS and Zoom lately as well. Prior to a meeting, I pre-recorded a couple of minutes of me watching the screen. I used OBS to switch to this looped pre-recording whenever I wanted to eat/drink or get out of my chair to stretch etc during the meeting.

It was mostly just to satisfy my curiousity on how difficult it is to do (it's easy) and whether anyone noticed the looping (no one did). But what I did find interesting was that I found it immensely 'freeing' to be able to participate in the meeting without being observed - there is something about knowing I'm on camera that I find taxing that I don't get in a face to face meeting.

If the meeting is big enough that you can get up without missing anything or your absence being noticed (an all hands), you can probably just turn the video off.

If it's small enough that people will notice/care that your video is off but not that you're not interacting (and you won't miss anything valuable by being absent), then your company really needs to re-evaluate its approach to meetings.

The "because I can" argument is perfectly reasonable, though.

That sounds like fun too! Did you put it on GitHub yet? And if not, then please do :)