For a wifi option, you can use Droidcam with OBS. Setup the virtual camera inside OBS and you’ve got a wifi webcam that you can walk around with.

I’ve used that setup many times and it’s sweet. At work my coworkers are all astonished and amazed when I use the OBS virtual camera pass-through to my virtual desktop to walk around while talking (I use a wireless headset for the audio). I can even show various overlays of my desktop with my face and a downcam I have setup for demonstrations (like a craft cam setup).

Combine it with RVC voice changing silliness and they’re all blown away. The security folks (of which I’m a part, haha) always freak out a little bit when they see me share my Linux desktop when I’m on Teams via the company’s virtual desktop. “That shouldn’t be possible!” Haha

I don’t have the heart to show them how you can copy and paste huge amounts of text into the virtual desktop directly (clipboard sharing is disabled and prohibited 🤣).

Scrcpy can do that. As it uses ADB, it supports USB and network (and therefore even f-ing Bluetooth)

Recent Android phones support UVC, which is the same protocol used by webcams. Pixels for example support it.

Macs can do this with iPhones… natively. I can tell either of my Macs to take a picture from my iPhone, and it’ll just do it. I’m not sure why that is a thing (e.g. if my iPhone isn’t in my hand, it’s not pointing at anything I want a shot of), but it is. Also, they make clips that attach the iPhone to the top of the Mac(Book) and point the screen away from you, letting its 2-3 cameras point at you, looking over the screen at you.

So if Apple does it, the big Android/Windows/Linux players want to make it an option, too. Fortunately this has been a thing (on the Apple side) for a couple years now, so, even before I skimmed the comments, I thought, “I should fucking hope so.”