“Lambert & Stamp” were a pair of aspiring filmmakers whose goal of making a movie about a London band called the High Numbers led to their becoming managers — of the group shortly to be renamed The Who.

Shot through with ’60s London energy, illuminating on several fronts and featuring bits of many great Who tracks, the film is nevertheless a mess that should be taught in film schools to illustrate how not to edit a documentary. Director James D. Cooper is all over the place, wandering off on detours and into blind alleys as he profiles posh Oxford-trained conductor’s son Kit Lambert and working-class boy Chris Stamp (younger brother of General Zod, Terence Stamp).

And Cooper makes bizarre dramatic choices: The death of Who drummer Keith Moon is here framed as the cause of a really boring lawyers’ meeting. We never even learn how or when Lambert died.