J-Zone's been diggin through his VHS tapes, and he recently found and posted a 1991 video of GZA, ODB and RZA appearing on the public access show, Rhythm & Soul. Write up, and video can be found here.
I'm not expecting any sort of revelatory footage or information to come out of this doc. The trailer seems pretty telling -- a bunch of rappers bitching at each other about money and creativity.