Thanks. It’s really intended to solve picture in picture for any application, but it looks like it does exactly was OP was requesting too.

I think I’d recommend OBS too, but I guess this is possible with an application I wrote.

If you want to install it, it is available on Flathub here.

edit: My webp video stopped loading for me, so uploaded a mirror to YouTube here

Thank you. I’ve been using it daily and I was starting to worry it was just me. Flathub shows all these installs but my traffic on Github has mostly just been clones without views.