One of the essential points of this video is that it is pretty difficult to explain the science behind this. But if you want to know more about it, instead of

One of the essential points of this video is that it is pretty difficult to explain the science behind this. But if you want to know more about it, instead of watching the video you should probably read https://en.wikipedia.org/wiki/Blackbird_(land_yacht) https://en.wikipedia.org/wiki/Blackbird_(land_yacht)