

I used an old phone with a broken screen as a webcam since covid untill it totally broke recently.
However it needed some stars to align; I had a 3D printer to make a custom holder so it could sit on my monitor unobtrusively. I also luckily had a phone with a built in method to limit the battery charging so it could be plugged in 24/7. I was able to disable all power saving and permission features, so the app could run 24/7 without being killed by android.
I used droidcam, which works with an OBS plugin nowadays. I got it to the point that I just needed to launch OBS and my webcam was on, no touching or fiddling with the phone at all.
This from the company that started the netbook trend with the $400 eeePC in 2007…