Orwell wrote:
Almost none of the already-limited Mac game library will run at all if you use an Intel graphics card. But that Nvidia card is about as crappy as they come, and won't support many games either.
It's true for older Intel IGP because its OpenGL is version 2 only and vertex shader is emulated by driver. But does it still hold true for Sandy Bridge?
Video editing program doesn't need advance 3D functions, so your program should run. Some of these programs like Premier can use GPU compute to accelerate rendering. Intel doesn't support it now and never will. NVIDIA theoretically supports it but the 320m is too slow to be meaningful.