I’m new to Qubes and excited to try it out soon, but I’m curious about how videoconferences (Jitsi, Zoom, Teams, Meet, etc.) work in Qubes.
Based on some of the other posts I’ve read on here, it seems as simple as attaching a webcam and mic (which I assume normally live in sys-usb) to an AppVM or DispVM set up with the software I want to use. I have two questions:
How would screen-sharing work? Zoom and others let you share a single application’s window; could I screen-share other applications if they’re in the same AppVM/DispVM? What if they’re running in a separate AppVM? What about screen-sharing the whole desktop? (I know it’s a risk to show the world what your desktop looks like, but I’m just wondering.)
Suppose I trust a laptop’s built-in webcam and mic, but I don’t trust proprietary video conferencing apps not to compromise those devices, keep them activated after I quit the app, etc. Could that still happen after I’ve detached them from the qube? Could a compromised mic/webcam attack sys-usb or other qubes later on? Are there any best practices here? (I could always cover the webcam, so the mic is my bigger concern here.)