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Definitely worth a watch:
https://en.wikipedia.org/wiki/Citizenfour
The one with Kanye West is worth a watch also. Dude is nuts, and I'm not a fan of his music, but after watching the interview, I have to concede that I was overly dismissive towards him, and there's a method to his madness. No wonder Musk likes him so much. If this sounds strange, watch the interview: