This is one of my favorite subjects. Not Hutchison, but speculation about how the ancients were able to cut and transport those huge blocks of stone. It might be that electrical effects are involved, but I'm not sure that's necessary. Hutchison effects might be real, but those videos he made had some rather obvious primitive video fakery. At least that's my opinion.
Here's an experiment I did longer ago than I care to remember. It's simplicity itself. I epoxied a small DC motor to the top of a brick and placed it in a sandbox. The motor had an eccentric weight attached to the shaft. Connected to the motor was a variable DC power supply. Obviously, the frequency of vibration could be controlled by varying the current to the motor. As the RPM of the motor increased to a certain level, the brick began to move. Depending upon small adjustments of the current, the brick might rotate in one direction or the other or shift slightly. When stabilized, the brick could be moved with the touch of a finger. You could see light under the brick through the oscillating sand. This doesn't exactly constitute levitation, but you could see how it could be interpreted that way. There are so many ways of creating sonic frequencies, it's hard to say how ancient peoples did it. There you have it. I encourage anyone reading this to replicate my little experiment and tell us what happened.