Don't waste your time with this "documentary".
Corbell was more interested in controversy than the science Bob Lazar risked his career/life telling. If he really wanted to help Bob, he should have focused more on how, 30 years since blowing the whistle, Bob's claims have been gradually validated by scientific discoveries.
Instead, the movie is chockful of indulgent asides coupled with flashes of clips that are barely relevant to the narrative. I really hate this movie. What a wasted opportunity. Bob himself said (non-verbatim) that all this question about his authenticity obscures the greater concern: that there is technology out there beyond our current capabilities as a civilization and the rest of the world needs to know this fact. That is the story Bob wants the world to know. Not this crappy artsy-craftsy faux journalism.