Ran into the problems mentioned in the article, and put a Logitech camera onto pre-order.
Cancelled that order last night though: possible to use an android phone as a webcam that's most likely better quality than the current generator of USB webcam. I chose this app [1], others are available.
[1] https://play.google.com/store/apps/details?id=com.pas.webcam...
I resorted to buying a magewell hdmi-2-usb converter. Better quality, I can focus and zoom from further away (no huge nose) and depending on your gear you have automatic background blurring (aperture+sensor size)
There's also a windows driver, but I haven't used that yet
Is the driver signed? If not, you have to enable "test mode" and windows will drop a God-awful watermark in the bottom right of your desktop letting you know "test mode" is on. It's one of the seemingly-small things that bugs me the most about it.
You can download an "NDI" apk for your cell phone since the manufacturer removed the app from the play store, to provide the ability for an android phone to serve as a network display interface (of course it's your risk to download APKs from a random site)