The Lost Concert - Addition

Interestingly the article on Chuck Berry's appearance at German Beat-Club TV 1972 resulted in a large number of emails. Among these was one by Dirk saying

About one and a half years ago there was a Rarities issue of the Vinyl TV series in which they broadcast another previously unseen part of this show.

I checked and yes: On July 1st, 2007 German TV station EinsFestival broadcast a Beat-Club Rarities show including unseen performances by Ike and Tina Turner, the Kinks, the Doors (less Jim Morrison), the Grateful Dead, and an interview with a drunk Steve Miller.
Also included was Chuck Berry with "Roll Over Beethoven" as seen below.
The announcers also talked about why there are such unseen performances. They explained that when bands or singers took the time to travel to Bremen, they would not want to do this for three minutes of play. So they performed for half an hour or more and Mike Leckebusch (Beat-Club director) let the cameras run.
I also had some time to re-check the old Beat-Club broadcasts. These differ from the Lost Concert broadcast a bit in that both "Johnny B. Goode" and "Let It Rock" had a color feedback of the camera input projected on the blue-screen behind Berry and the band. The latter also has an insert listing the artist names Snow, Kinsley, Harrison, Campbell, and Berry.