the movies play a little laggy

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http://forums.fedoraforum.org – I have installed Fedora 17 DVD. Any movie I play in any movie player I try is a little bit laggy. For example when the camera is rotating at a constant speed, I can see small height "waves" on the video surface. I can't say that the movies are 100% not watchable, but still it's annoying. In any movie in windoze I don't have this problem. CPU usage is about the same in both OSs. Can someone help me solve this...? Thank you in advance. (HowTos)