RIP Morgan Spurlock

Documentaries like Juri dreams of Sushi, A Band Called Death, even silly, kind of ridiculous and maybe sad moments one like The Decline of Western Civilization Part II: The Metal Years, and an outstanding heavy metal documentary about forgotten, early 80's Canadian metal band, Hammer: Heavy might have a few faults, but tell a coherent, more honest story.
Do you mean Anvil? Or is there an entire subgenre of heartwarming documentaries about underdog 80s metal bands from Canada?