See: https://askubuntu.com/questions/1241202/cant-access-webcam-settings
$ sudo apt install v4l-utils
$ v4l2-ctl --list-devices
$ v4l2-ctl -d /dev/videoX --list-ctrls
$ v4l2-ctl --device /dev/video3 --set-ctrl=zoom_absolute=120
See: https://askubuntu.com/questions/1241202/cant-access-webcam-settings
$ sudo apt install v4l-utils
$ v4l2-ctl --list-devices
$ v4l2-ctl -d /dev/videoX --list-ctrls
$ v4l2-ctl --device /dev/video3 --set-ctrl=zoom_absolute=120