Samsung SGH-T809 / SGH-D820
Question about Video playback
The "up" key takes you back to the video folder for videos in the phone memory. It does nothing when playing videos on the memory card, which is probably what you were doing. I'm not sure why is does different things, but that's what my phone does.
To get full screen press the "1" key once the video is playing.
Press it again to flip it full screen the other way.
Press the 2 key to change skins when it is not in full screen mode. 😉