I just discovered this beautiful video by Xavier Chassaing. He said it's been made with 35.000 single photographs combining "an innovative mix of stop motion and live projection mapping techniques."
Well that still leaves me with a lot of questions. I would love to know exactly how he's done it. A making-of video would be brilliant.
But maybe it's better to be left in wondering awe like a little child watching a magician for the first time.