take a screenshot, ssh it someplace

gistfile1.txt

#!/bin/bash

/opt/homebrew/bin/ffmpeg -ss 0.5 -f avfoundation -r 30.000030 -i "0" -t 1 /Users/topher/window_shots/"grmi_$(date +%F_%H-%M-%S).jpg" -frames:v 1

unset -v latest
for file in /Users/topher/window_shots/*; do
  [[ $file -nt $latest ]] && latest=$file
done

keychain --noask --eval id_dsa

scp $latest cat:~/www/example.com/public_html/window_shot.jpg