i just watched a video/autobiography from Weezer' lead singer, rivers cuomo, and i thought it showed how elastic the boundaries of documentary can be. personally, i feel this video is documentary, and i especially love how primitive it is. the video might seem a bit playful/given what we know about the band's sensibilities, but the story he is telling is real and true.
...i dont think it's any great work of art, but i do think it tells a story.
watch the video here