Trumped: Inside the Greatest Political Upset of All Time

Given its timing in very early 2017, there's no way this could be a definitive examination of Election 2016 or "what happened"; purely as a compilation of archival footage that gives a flavour of how it felt, this works very well - the "greatest hits" clips are organised in a driving, rhythmic way. Perhaps the most powerful conclusion to derive from this is that, for better or worse, Trump actually did want to become president, as opposed to concocting a publicity stunt that went too far.