Replying to Best ISO setting for video on D800?

Hey guys I just wanted to see if someone could educate me on the best ISO's for filming again.  I remember reading previously that some ISO's held up better then others when shooting video.  Some of my shots have seemed a bit noisy and I thought I'd make sure I'm hitting the "prime" ISOs for my camera (Nikon D800).  I faintly remember something about multiples of 160?  Any help on what the best settings are for as noise-free of an image as possible would be great!