People,
This is a good one and has good information on the Hopi Indian underworld, but the first half has some genetic analysis, human vs. reptile, and talk about the base under Dulce, which could be true. But the last half relates the Hopis with Egypt and the Phoenicians, and there some descriptions of the Hopi caverns and some history about its discovery, starting with the Kincaid article in Arizone back in 1909..
Its good to have a strong base to our cavern worlds understanding, and this video passes on quite a bit.
Dean