Cannot transfer recorded big video files to computer

So I recorded a 12 min vid with the touch the other day, and it just' won't transfre to the computer. I get some error & it won't go through my desktop. The vid plays fine on my ipod. So I just did another test to record another 12 min vid, and I got the same problem with that video. Seems like I'm not able to transfer big videos to my computer because I'll get an error.....