For me, the only use I am seeing is to mount the remote cam on the top of my helmet and video another rider following behind. This can be a very good perspective.
BTW, "Quick Capture" does work with the remote camera.
However, the usage above would require the app for aiming and review of footage to make sure the angle is STAYING correct.
This is tricky because you tend to lean forward and the aim goes high instead of low. When I tried this with the main cam, I did not review and most of the footage was of the sky.