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The supposedly flying contraption at the end is suspended by a wire hanging from something like a crane above. Note the angle of the man when he appears to be swinging a stick above the device? He keeps his back to the camera such that it is not possible to perceive the depth of the stick and whether or not it is actually above the device. It appears to not be above the device despite looking as though it is. Also, it would be totally possible to suspend the device from below in a similar manner to those "magic" fountains that appear to be supported by the stream of water coming out of them.
And a randoms comment on YouTube holds so much weight why?