Citizenfour (2014)
As a documentary, this movie has a bizarre, nearly non-sequitur cliff hanger ending which detracts. That aside, the story falls into three parts with meeting Snowden as the middle. The movie functions like an extended version of those initial interviews with him when he outed himself as the leaker. As such, a major feature of the exposition is the size and effect of the programs he brought to light. They and he with his concerns about them become easier to understand. Government responses look even more outrageous. You should take a look anyway. This documentary helps to make sense of the breadth of the disclosures. Quoth J Appelbaum, a fellow from the third part, "What people used to call liberty, and freedom, we now call privacy.
"...And we say, in the same breath, that privacy is dead."