Man, I don't want to say another word about the Mass Effect 3 ending, but these folks do -- in fact they want 90 minutes worth. This is The Indoctrination Theory, and attempts to explain all perspectives on the ending. It's pretty definitive.
Discussion about the ending is unlikely to end. The whole fracas has genuinely put me off the game, and I honestly doubt if I'll ever finish it. But for those who have invested time discussing and debating Bioware's controversial ending, this is about as long, and as indulgent, as it gets.
I'll say one thing -- a game that can inspire this kind of dedication? Whether or not you like the ending of Mass Effect 3, that's some achievement.
You can discuss your thoughts on the documentary at the creator's website, or in the comments below!