The documentary starts off by explaining what it is that is so amazing about the pyramids. I'll be honest, i'm surprised that this isn't something that is more talked about. Personally, I have never thought about how something as amazing as the pyramids were built thousands of years ago - I assumed that the experts knew the answer. But it turns out they don't. They have no idea how the Egyptians, with only stone chisels and rocks, built the pyramids in 20 years. That's the only thing they are sure about, is that it was built in 20 years. But all the engineers who are in the documentary say that they think it would be near impossible to build, even today with our modern tools.
The documentary then links the Pyramids to other wonders of the world such as Easter Island, several ruins in Peru, Mayan ruins in Mexico, and some hidden pyramids in China. That's another thing that blew me away. Apparently China has several pyramids which can be seen in satellite pictures but they deny their existence and have actually started planting trees over them so that they will eventually disappear.
So how do we explain all of these things? In the documentary they briefly mention God and aliens, but then they come to another conclusion. Perhaps a more advanced civilization lived on the earth and was wiped out by a huge natural disaster, such as an ice age, or the magnetic poles reversing. Perhaps they left all of these things as clues to warn us of the next disaster. After all, the only thing that could possibly survive thousands of years would be something as immense as the Pyramids. It is certainly some food for thought, and I think the idea of a more advanced human civilization existing 12,000+ years ago (the approximate date of the last ice age), is definitely something to explore.
If you want to watch The Revelation of the Pyramids: http://vimeo.com/32828241