You'll need to update your nvidia drivers.
This is a common issue. For the longest time, nvidia's drivers conflicted with Gothic 2, and it wasn't until some months ago they finally fixed it.
Also, regarding the blank intros, I have the same issue. To fix it (Mostly.) go in the gothic.ini in your game folder and set "scalevideos" to 1, and it should work.
The two bugs aren't linked, and I say it mostly fixes it because while I can see the videos now, sometimes they'll just flicker rather than play properly. A chance is still better than just audio though.
You can also disable the startup videos in that .ini as well. Anyway, good luck.
Post edited May 08, 2011 by jackmix69