it's funny to see this, as I had to capture video from my gp2x today. I used the TV output and use a video capture card on my PC.
here's a link to what I captured...
wmv of Sprite Garbage on the gp2xBTW is it normal for the TV out to cut off the right edge and bottom few lines of the gp2x screen? I'm using the tv output cable plugged into the ext port on the gp2x.