We Are Legion - The Story of the Hacktivists (2012)

 "We Are Legion: The Story of the Hacktivists" is a documentary that takes us inside the world of Anonymous, the radical "hacktivist" collective that has redefined civil disobedience for the digital age. The film explores the historical roots of early hacktivist groups like Cult of the Dead Cow and Electronic Disturbance Theater and then follows Anonymous from 4chan to a full-blown movement with a global reach, one of the most transformative of our time.

A nice documentary related to Anonymous. Different views from different people about what is Anonymous? Who is Anonymous? etc..