Startup fails if camera is not named /dev/videox

[firesurfer]

I thought an additional issue might make sense as it differs from #310. As already stated in PR #311

With udev and/or in containers it is possible to have the camera mounted where ever you want in the file system instead of just /dev/videox. I suggest the code should not make any assumptions about the possible paths

I didnt perform any tests yet but I think v4l2-ctl --list-devices will actually correctly list all devices even if they are not at /dev/videox

Example output for my system is:

Logitech Webcam C925e (usb-0000:12:00.0-1.3):
	/dev/video0
	/dev/video1
	/dev/media0

So apparently it finds the /dev/media0