this is my attempt to simplify how to use VLC with your webcam plugged in. Assuming it works.
remove all other phones or camera before attempting
open vlc
Click Menu -> click stream
dialog box appears
Now click the TAB for capture as per image
https://imgur.com/x3KMJkB
capture mode.....pulldown and select video camera (= webcam)
........pulldown video device and choose /dev/video0 (its video0 because you have only one camera connected)
.......pulldown audio device and try hw0,0
(If no sound recorded we can change that later)
......Options.......choice one.....stream to a file so
.............pulldown and choose all.(image shows pal but choose all please)....click stream
click next
click next (for next box)......filename....click add ....and in filename box lets call it vlc
(file will stream and save to your home dir so make sure you choose an unique name
in next box....click inside Profile and choose top item (mp4)
click stream.....click stream all miscellaneous
click stream........video will NOT show inside vlc....but look at the pause/play button.....it should show as a pause button
----which tells you that it is recording.
press pause to stop
use filemanager to navigate to filename you chose....eg vlc
use vlc to play it
good luck
