While I was watching YouTube today , I reminded that YouTube a few years ago was really slow , and CPU hungry , nowadays YouTube works up to 1 GHZ and no matter what video card you have. All the videos work just fine , and you can go even under 1 GHZ if you set videos to 280p when available.(Usually it's always available.) Make sure your video card is at least 3 megabytes , and that you have at least 1 GHZ CPU for smooth video play. YouTube also has fast servers , and most of videos should work with 56kbps , however some of them would require a little bit more.