activate_webcam

Find Mount

ls -ltr /dev/video*
zsh: no matches found: /dev/video*

Plug-in your webcam and re-run the command:

ls -ltr /dev/video*
crw-rw----+ 1 root video 81, 1 Dec 30 13:36 /dev/video1
crw-rw----+ 1 root video 81, 0 Dec 30 13:36 /dev/video0

Get Hardware Info

hwinfo --usb
03: USB 00.3: 0000 Unclassified device                          
  [Created at usb.122]
  Unique ID: u4KZ.FhPHuyntn_1
  Parent ID: k4bc.2DFUsyrieMD
  SysFS ID: /devices/pci0000:00/0000:00:14.0/usb1/1-12/1-12:1.3
  SysFS BusID: 1-12:1.3
  Hardware Class: unknown
  Model: "webcam"
  Hotplug: USB
  Vendor: usb 0x1d6c "webcam"
  Device: usb 0x0103 "webcam"
  Revision: "0.10"
  Serial ID: "20200628"
  Driver: "snd-usb-audio"
  Driver Modules: "snd_usb_audio"
  Speed: 480 Mbps
  Module Alias: "usb:v1D6Cp0103d0010dcEFdsc02dp01ic01isc02ip00in03"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #11 (Hub)

If driver is not active - activate it:

sudo modprobe snd_usb_audio

You can now test your webcam using the software cheese:

sudo pacman -S install cheese
cheese