Part of her trilogy about the world (post 9-11), Citizen Four is a stunning 2014 documentary film directed by Laura Poitras, concerning Edward Snowden and the NSA spying scandal. Citizen Four received critical acclaim upon release, and was the recipient of numerous accolades, including the Academy Award for Best Documentary Feature at the 2015 Oscars.
The film had its USA premiere on October 10, 2014, at the New York Film Festival and its UK premiere on October 17, 2014, at the BFI London Film Festival. This film features Snowden and Glenn Greenwald, and was co-produced by Poitras, Mathilde Bonnefoy, and Dirk Wilutzky, with Steven Soderbergh and others serving as executive producers.
Access here: https://archive.org/details/Citizen.Four2014
Note: This film was strangely BLOCKED to viewers in the USA: https://www.youtube.com/watch?v=KQ0DeRg1IhI