Ginger Baker alluded to that in the interview on the DVD.... said that they were musicians, and went out to play music, not jump around and run all over the place.
I decided to watch disk 2 of the set first (Toad, Sunshine of Your Love.) Shot in high-def, the video is great. You can tell they've aged a bit, but the sound is still there. The difference in Ginger between the interview and performing is interesting. In the first, he gives the impression he's about ready to keel over, but once at the drums he just keeps going and going and going.
Just saw the DVD, and I saw them live in 1968. I detected a somewhat different group---a little less energy, esp. on "Crossroads"---but still fabulous musicianship. I have to say I don't think Baker is too bright, but a helluva drummer. He seemed much more "straight" in terms of his playing than in the 60s---fewer odd rhythms, less playing off Baker or Clapton, and more . . . well, . . . cowbell.