How to find which device (/dev/video...) is able to be used as a v4l2 webcam/stream?

webcam-devices.MD

How can we see v4l2 capable video devices?

# install via `dnf install v4l-utils`
sudo v4l2-ctl --list-devices

C922 Pro Stream Webcam
	/dev/video2
	/dev/video3
	/dev/media1

3D Camera: eTronVideo
	/dev/video0
	/dev/video1
	/dev/media0
...

But, which one of these is actually the webcam e.i. which one can provide a video capture capability?

sudo v4l2-ctl --device=/dev/video2 --all

Driver Info:
	Driver name      : uvcvideo
	Card type        : C922 Pro Stream Webcam
...
	Device Caps      : 0x04200001
		Video Capture  <==========================
		Streaming
		Extended Pix Format
...

Versus:

sudo v4l2-ctl --device=/dev/video3 --all

Driver Info:
	Driver name      : uvcvideo
	Card type        : C922 Pro Stream Webcam
...
	Device Caps      : 0x04a00000
		Metadata Capture   <==========================
		Streaming
		Extended Pix Format
...

More info: https://unix.stackexchange.com/questions/512759/multiple-dev-video-for-one-physical-device