well, compared to having just onboard video, yes, there would be a good step up going with a vid card. but if you have a bad or low quality file in the first place, then it wouldn't make much of a difference. are we talking videos that are already on the comp, or dvds being played in real time? once you have a video card, going up to a better video might not help, due to plain videos not relying that heavily on video cards, vid card mostly are more towards gaming.