First guy has some interesting theories which I wonder about. First he claims Egyptians came upon their measurements using a drop of water. Fehmi claims a drop is always the same. I see a problem with this as one object from another dripping water makes different sizes. Even if they had an official dropper it seems almost impossible to have the same size. So Egyptians measured a drop and announced it was a mm.
At at this point below, he states they can melt granite, which we know is 100% possible using 4x4 fresnel lenses in your backyard, as well as the cinder brick under that rock and rovers dog house behind it if you're not careful. But the problem for many is that they say pouring that melted granite would not reform into perfect granite. Granite breaks down into forms of glass and other chemicals and minerals. So this is questionable as well.
At this spot he starts out explaining Egyptians made glass and lenses. Which I feel is doable if they knew the properties of soda and limestone. Although also in this particular section, he does show examples of art and vases that no one has yet figured out how they made them. To me those art pieces are almost more of a mystery than the pyramids.
1:27:34 I don't know if this link will go to that time or not..
Also, the second pyramid video is more or less agreeing that most the construction was synthetic material and concrete.
Market Data 
Markets 
AI
