It should play the whole length, are you using windows media player? Sometimes you have to rewind it because the computer didn't catch up to the video (The video already started playing)??? I don't have this problem with any of my cameras....How come when I upload my videos on my computer, it only transfers a portion of the video. I have it set on 25 seconds and I can watch the whole video on tv, but not on the computer. Any suggestions?