If you already followed the story in the news then there's nothing new in this documentary. If you wanna learn about the story, its a good one.

Its narrated by Keanu Reeves. It has decent scores (~7-8 out of 10) on IMDB (already linked) and Rotten Tomatoes [1]

OP was asking about a Hollywood movie though; this is a documentary. A Hollywood movie would be to Snowden what this documentary is to Citizenfour.

[1] https://www.rottentomatoes.com/m/deep_web