Lightning in a Bottle
Starring Gregg Allman, Solomon Burke, Bill Cosby, Chuck D, Buddy Guy, Levon Helm, B. B. King, Bonnie Raitt, Mavis Staples, Hubert Sumlin
It's a documentary and music movie, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.