rockumentary

plural rockumentaries

1. A documentary about rock music or its musicians.

   The first 30 minutes or so of "Metallica" have the flavor of a standard behind-the-scenes rockumentary.

   2004 September 7, A. O. Scott, “FILM REVIEW; Heavy-Metal Headshrinking and Other Secrets of the Rock 'n' Roll Business”, in The New York Times

   2 more examples

   It occasionally suffers from the pontification so deservedly satirized in rockumentaries like This Is Spinal Tap.

   2007 December 17, Daniel M. Gold, “The Early Years of Rock, Later Than Previously Thought”, in The New York Times

   When Nirvana toured with us in 1991 before Nevermind broke, no one in Europe knew who they were. They were often the first band onstage at festivals, playing amazing shows filmed by Dave Markey, the filmmaker who came along with us to document the tour that later became the film 1991: The Year Punk Broke. The movie had a lot of humorous moments of over-the-top self-indulgence—it was basically a spoof of rockumentaries. Kurt was always funny and fun to be around, and seemed to soak up any kind of personal attention. I felt very big-sisterly, almost maternal, whenever the two of us were together, and it shows in that film.

   2015, Kim Gordon, chapter 30, in Carrie Thornton, editor, Girl in a Band, New York: Dey st., →ISBN, page 179