Originally Posted by feath3r
From 0:50 onwards you can hear the sound I've started to get every now and then, not sure what it is (I suspect it is related to battery, as it never appears with a fresh charge). And funnily enough, it only appears when the cam is with me, never on the plane (is it picking something from the transmitter?).
That's the first harbinger of a dying battery. A few minutes more and your video will look like this
, just before the camera shuts down. The camera should be able to detect this and save the video before the camera stops working.
Charge the battery and the sound will stop.