Being newly the proud owner of a webcam I gave it a try, and everything presumably works:
![enter image description here](https://community.wolfram.com//c/portal/getImageAttachment?filename=camera.png&userId=32203)
As it seems with this type of camera I can only adjust the rastersize / imageresolution.
(The device shown in the image is an essential one: it is permanently laying on my desk; if turned upside down it makes "moooooh" - and this is in order when things become too scientific and serious!)