The previous post features a video shot in a vertical orientation, so in the interest of aesthetics and all that is holy, let me point show you a couple of educational videos explaining why you shouldn't shoot videos that way:
Here the Glove & Boots folks explain why vertical videos are wrong and destructive to human civilization:
If you prefer lovely singers to enraged puppets, here's one who starts with a gentle reminder but is prepared to be more emphatic if needed:
The singer is Anna Toth, and the song is available on iTunes.
Incidentally, it's rumored that Apple's forthcoming iPhone 6 has a much larger battery, possibly to support a Taser-like function whenever the phone detects that the user is shooting video with the phone held upright. This may help.