The http://www.drumchannel.com/ website has lots (and I mean LOTS) of movies that feature Terry Bozzio as a host of "Art Of Drumming", a series of interviews and jams with drummers.
One of the latest one that has been added is a concert by Terry Bozzio, Tony Levin, David Torn and Pat Mastelotto at Sabian live at NAMM 2010.
And another one that you definitely should check out is the interview (and jam) with Brian 'The Brain' Mantia. Zappa (and The Black Page) get a mention. He also has some superb stories on working with Tom Waits.