Beyond the history lesson, the film adds a personal element by focusing on jockeys from two generations: British turntable legend Carl Cox and youth Dutch phenom Martin Garrix.

The documentary follows Cox's winding down and Garrix's rise, along with an entertaining, if familiar, history of electronic dance music.

What works in a nightclub set doesn't always work in a film, as electronic dance music documentary "What We Started" demonstrates.

An illuminating and entertaining documentary.