Fallback in video_device_monitor_impl.cpp dosn't work.
Udev isn't supported inside a Flatpak sandbox and judging by the code inside video_device_monitor_impl.cpp it should automatically fall back to enumerating /dev/video# devices. For some reason this never gets executed and patching out the udev related code triggers some infinite loop. Since I'm not a c++ expert my patch could be at fault as well. Last where are the JAMI_ERR() calls going, I don't see anything in stdout?