Via Dave Douglas, I see the New York Public Library has taken video excerpts from archival interviews with a number of jazz greats -- Art Farmer, Jimmy Heath, Chico Hamilton, Randy Weston, Yusef Lateef1 and many others -- and made them available on their website. These clips are part of the Louis Armstrong Jazz Oral History Project, and they are definitely worth your while. Check out Chico Hamilton talking about Louis Armstrong's quarter note feel, for starters. (I know you've seen [ahem] other people do this, but Chico's got it down.)
1. Don't miss Yusef's kidding-on-the-square disclaimer.