(which will appear as a camera source on its own, no OBS required. I was for a while a happy Camo user too, but eventually bought a webcam so I didn't have to hook and unhook my phone; it's good software)
I'm an iPhone webcam user because commercial webcams are incredible worse in quality than modern day smartphones. I regret purchasing one of the better rated Logitech ones and appearing like a washed out zombie on video calls.
Meanwhile we walk around with a quasi-DSLR in our pockets.
It's awful. I've got a C920 as well, and it turns me into a washed-out green/yellow goblin. There's an exposure slider in the driver but it's buggy so if you set it to manual exposure, after a few minutes the whole image goes super exposed as if pointing straight at the sun and you can't see anything anymore until I unplug and plug it back again.
I bought it at a premium at the height of the COVID-related hardware shortage and I regret it every time I see it in my drawer.
FWIW I've used iVcam until recently, and I'm now an happy user of Reincubate Camo