I have done it also, though I didn't go as far as First Officer Geebax. Only out to the back yard. But now I keep a couple of extra sd card in the case I haul the Phantoms around in, that helps out with that problem.
Yes, you're not alone... especially early on when you're concentrating on flying and great camera angles... as for the SD card, well these days I keep a spare in the backpack.
I just know that 5 seconds after posting this I'll realise what the answer is but for the life of me so far I don't know but...... What does the D and U stand for?
I've lost count of how many times I've spent ages getting the perfect shot only to realise I hadn't pressed record. Now I just record from takeoff to landing constantly and cut the scenes in post.
I have never understood why the default mode is not made to record video while the drone's motors are running and to stop recording when the motors stop. Seriously, how hard would that be to implement and how many would opt to turn it off (I am sure there are a few)?
Part of the reason maybe because of the two second gap between files when you are continuos recording. I didn't take that into account whilst flying tonight and think I'm going to have one of my shots spread across two files, complete with the two second gap