You have three resolutions on that video - not more resolution. Regular size, larger size and full screen. It worked for me, but then I do not care for full screen anyway and never watch a video that size - too block-y and resolution is not increased. Maybe a HD video would be different, but right now I would have to say it is the video card and could be a combination of video card and computer. Games get that way also, when a lot of data has to be done in the graphics on the computer. General computing is usually what video is set up for. Get up Windows for graphics and set the video card for Performance or High Performance. Usually getting up the Properties for the video card, somewhere you can change all of that. You will not have sliding windows or anything like that but performance of the video card will be the fastest it can be.