Finally made an account, just to reply to this. With newer Canon DSLR bodies you can use the Canon Webcam Utility[1] to directly get the video feed show up as a webcam, with just a USB cable.
I've been using the EOS R as my webcam with the RF 35mm F1.8 lens and it's working pretty great. I just hook it up with the USB-C cable and it shows up as a webcam.
The only annoyance that I haven't been able to get around yet is switching batteries. There's a Kickstarter project[2] for a battery that is hot-swappable, but among those features it also allows you to just use the power while plugged in, which I'm eager to try out.
I haven't tested the audio quality of the camera, so I can't say much about that. I've always just used my headset. I would expect it to be somewhere between meh and ok-ish. Of course you could invest in a proper mic plugged into the Camera[3].
I have it set up on a tripod behind my desk. One thing I have been considering is getting some kind of a monitor arm style setup for the Camera, but so far I haven't found such a product.
The setup of course is quite expensive depending on the Camera, but I already had the camera and tripod since I do photography as a hobby, so I was pleasantly surprised when Canon came out with the webcam utility.
Is it worth it? Probably not if you just want something that works all the time. I mostly use the camera to take photos, so I have to re-mount it every time I come back from shooting, and keep the batteries charged, etc. but people do notice and it's fun to see their reactions and getting accused of being a YouTuber every once in a while.
[1] https://www.usa.canon.com/internet/portal/us/home/support/se...
[2] https://www.kickstarter.com/projects/x-tra/the-camera-batter...
[3] https://www.makeuseof.com/tag/best-shotgun-mic/