I've got a galaxy tab 4 smt230nu; I know I can shoot video with it, at hd - but I'm wondering how long I can shoot - I have an event I'd like it to run for a steady hour (or maybe a little more) - it wouldn't have to move around, but I wanted to know if it will run on video continuously that long without shutting off or something (will probably be unattended), and then how I would store something that long - I have an sd card in it, but I wonder if I'd save there and how big the card would have to be. Thanks for the info -