Certainly not the most beautiful drone video, but in terms of technical accomplishment it is absolutely awesome. It must have been very small to go where it did, and the video definition is excellent. The audio ?dubbed in or ?copter blade whirr deleted? And the speed - at times it looks "speeded up," but the motions of the humans are appropriate. So kudos to the operator for dexterity.
Addendum: An article in the Minneapolis paper about the making of this video. No CGI. One take.