Everything else works fine, i have no other issues with the game, just that one annoying thing, basicaly i can't play the part i will probably enjoy the most

Heres a video from youtube aswell, not mine but someone else has posted this aswell, i have the same exact issue:
https://www.youtube.com/watch?v=g4x9LVYqgWQ
If anyone out there has a fix for it or has an idea what to do, PLEASE help me out.
My Rig info aswell:
Intel i5 750/2,67 GHz
4 gigs of ram
NVIDIA Gforce GTX 550TI
I'm running 64 bit Win 7 Home Premium
Thanks !