Brainstorm and Dzyan on TV

Has anyone ever seen either of the two German seventies prog bands Brainstorm or Dzyan on television in the past?
       My primitive computer set-up does not work with youtube that well, so i cannot verify there, but does anybody know of any videos for them, where they are in concert?
           I e-mailed Roland Schaeffer, the sax player for Brainstorm, about this but got no reply.
      There is a dvd documentary on Dzyan's drummer Peter Giger called Lord Of The Drums, but i cannot locate it-could there be some footage on that?
         I know for a lot of people these bands are kind of "yeah, who", but they are two of my all -time favorite bands, and would love something both visual and in concert.
                      Any info would be greatly appreciated!