I've gotten away with simply firing up OBS and "screen sharing" the virtual camera. Has worked fine on Zoom and Slack huddles, with the added benefit of giving me other things that OBS can provide: easy recording, scenes, text, source management, plugins, etc. For a casual conversation it's somewhat overkill, but when you're doing something more serious or formal, or need to switch between a keynote/Powerpoint and a screen share, or a video capture device, it's wonderful, and actually rather easy to get going in.
The other day I tried installing OBS on a Mac and this was not my experience. I couldn't even get it to recognize the built-in MacBook camera, much less share a screen or a mic or...
I've successfully got OBS set up on Linux in the past and managed to get a simple workflow running, but even that took a lot of fiddling to get started and I had the darndest time finding what I needed. The UI reminded me of GIMP—I'm sure I could eventually figure out how to work it and it probably makes complicated workflows possible in ways that simpler tools don't, but for a newcomer it has been overwhelming.
You have to install with admin, and everything then works entirely out of the box. I get away with ignoring most of it, and everything there is really intuitive after a day or so. Probably the most intuitive setup I've seen.
