So you've got similar specs to me apart from the graphics and you say no problems? That's put my mind at rest that I should change that. Thanks.
I think it does need a format but not seriously. I'm guessing the reason that the videos run slowly is because a MX 440 can't handle HDRI videos at very high res. lol. I forgot that it was that which I was trying to watch.
Do you find ATI are good/better than Nvidia?