Lauching Talk directly into a video call with zero clicks

I would like to set up a single board computer to monitor a doorbell circuit and launch a NextCloud Talk call when the button is pressed. Playing around trying to demonstrate the functionality, my biggest problem seems to be starting the call from the unattended SBC. I can get a script to launch a browser with a URL like, but there are button clicks required to actually start the call.

Is there a way to launch a video call directly from a script using either a URL or the Talk Desktop client for Linux (with command-line options)?