HD Video not playing right on 7900gtx

[NOGA]

I just got my new HD camera and IÂ’m trying to edit some film in Adobe Premiere 2.

When I try to edit the film, the preview is really shaky and strange.

This also happened when I try to play these videos in 1080p

http://www.apple.com/trailers/independent/dinosaurs3d/hd/

Why isnÂ’t it playing the video correctly?

Thanks, Noga

EDIT

It dosent happen when I export the video.

 

[SYL\X/3K]

have u downloded the lastest version of direct x 9.0c?
do u hav a codec installed?

 

[NOGA]

codec?

 

[SYL\X/3K]

i dont know if u need one but it comes really handy when it comes to playing videos

k-lite codec
http://www.free-codecs.com/download/K_Lite_Codec_Pack.htm

 

[NOGA]

which one should I get?

 

[SYL\X/3K]

Download [ K-Lite Codec Pack 2.81 FULL ]

 

[NOGA]

So what does it do? Just want to know befor I download it.

 

[NOGA]

Fixed all i did was restart my pc...