I just rented and copied that Richard Pryor Live DVD, and it's gotta be the lowest quality shit I've ever seen hit DVD. The actual VOB file was 1 gig, for the whole DVD. There are a grip of trails when you watch it, like when he moves across the stage, it makes you dizzy after while. I'm sure they could make at least a little better quality. That's tied with Eddie Murphy Delirious on my list.
I remember Martin Lawrence had a funny ass one too. Some of that new Chris Rock is alright too, as well as his first one.