How Hackers Changed the World – We Are Legion is a documentary about Anonymous, a hacking documentary released by BBC. It goes in depth to describe some cyber attacks such as Church of Scientology, Paypal, Amazon, Visa, Mastercard and world governments in order to shame them for their shady actions. Anonymous attacked online payment providers when they boycotted Wikileaks, they helped to provide black market Internet connections to disseminate information coming out of the Egyptian protest movement.

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According to Wikipedia, Anonymous is associated a loosely international network of activist and hacktivist entities. The group became known for a series of well-publicized publicity stunts and distributed denial-of-service (DDoS) attacks on government, religious, and corporate websites. You can find more details about the hackers group called Anonymous here.

 

 
For more details, watch the documentary: