videopc-dotfiles/local-bin/get-pulpit-device

#!/bin/bash

possible_streams="$(v4l2-ctl --list-devices | grep "^Cam Link" -A 20 | \
                    grep "^\s*/dev/" | sed 's/^\s*//')"

[ -z "$possible_streams" ] && exit

while IFS= read -r stream; do
    doas v4l2-ctl --device="$stream" --all | grep -q "^Video input" &&
    echo "$stream" && exit
done <<< "$possible_streams"