Shoah

Claude Lanzmann's nine-and-a-half-hour documentary about the Holocaust uses no archival footage whatsoever — only interviews with survivors, witnesses, and perpetrators filmed in the 1970s and 80s. It took twelve years to make. Roger Ebert called it the greatest film he'd ever seen. It's not a movie you watch; it's an experience you survive. At 566 minutes, it demands more of its audience than any other documentary ever made, and it earns every second.