Those guys also have a video claiming the moon is actually a giant artificial spaceship that's hollow on the inside.
Look up the equations for how much energy it takes to lift an object of particular mass and surface area using accoustic levitation and then crunch the numbers. I'm pretty sure the sound necessary to lift a single stone would be over 100x more powerful than the most powerful speakers in human history and require more energy than that produced by an entire power plant. Also, a sound like that would kill everyone in the vicinity, so who controls the levitation?
Since they're proven that a crew as small as 10 (on level ground) to 20 (up a ramp) can move a stone of the same size over the right rollers and crushed rock, I'm pretty sure that's a slightly more plausible hypothesis.
Imagine if ancient civilizations had the technology to produce untold amounts of energy and were able to actually levitate shyt, and then they used that incredible technology to produce....basic ass nearly useless stone buildings with small rooms inside for dead inbred leaders.