Unless the Hells Angels are involved, music-festival documentaries usually aren't worth the price of a ticket stub, but this mesmerizing film, following the experimental British fest, is an exception. Jonathan Caouette (Tarnation) compiled footage and photo stills from over 200 professional and amateur sources (HD, DV, 8mm, cellphone), and edited them together in gorgeous, inventive ways, mixing split-screens, grainy Super-8 and old TV footage. Curated by Patti Smith, Mogwai, Portishead, Sonic Youth and more, performances happen everywhere: under tarps, on the beach, in a casino. David Cross gets heckled and Daniel Johnston plays on the grass, and in a motel room where eager fans hang over the windowsill. A dreamy view of music, fandom, youth and instantaneous communities.