> get desktop audio for screen recording with QuickTime

A famously missing macOS feature. Loopback is yonder: https://rogueamoeba.com/loopback/

> the shortcut to stop screen recording on QuickTime sucks, it’s like CMD+CTRL+ESC

I just stop it from the menu bar, then on the resultant video press Cmd-T (trim) to lop off that footage.