my laptop

Well... my laptop is either starting to crash (possible) or it just can't handle a large video file. I downloaded a Videocast from dl.tv, where they have the Consumer Electronics Show (CES) in Las Vegas. The file is 268MB, and every time I try to play it... Itunes crashes.... so I'm not sure what the issue could be... I did try re-installing itunes... but that hasn't helped... I just think that my video card can't handle the video.... if you have any other ideas let me know....