Look, editing video is time-consuming, even when you have all source material ready to use. Imagine gathering thousands of cell phone clips from concerts, syncing them up and building a one-hour-plus movie out of them. Oh, and add HQ audio and sync that as well, just for quality control. A group of fans did just that and the end result is amazing.
The EDM scene spent itself quite quickly. When you have the big majority of a “scene” copy-pasting hit songs, there’s bound to be some quick burnout from the fans and some artists alike. Even though Porter Robinson exploded during the height of the EDM movement, he never quite identified himself with it. And that was a good thing.