I'm an iPhone user, so the phone i use with the Mavic's controller is an iPhone 6. The controller plugs into the lightning connector on the bottom and appears, I assume, as a USB device to the phone.

My original idea to get HDMI out was to use Apple's Lightning-to-HDMI dongle. This natty little device also has Lightning in so I reasoned that I should simply be able to plug the controller into that, the HDMI googles into the HDMI port, and the dongle into the phone.

But of course, that doesn't work (life is never that simple). I'm guessing that the Lightning input to the dongle is only for power and doesn't do USB.

So ... onto Plan B.