I love these videos. I watch them every couple years just to re-amaze myself at how very possible it was for like 2 people that simply understand how levers work to get 50 other people to do an amazing amount of stuff.
Now, if you want to accidentally turn yourself into a "conspiracy theorist," you can also learn about geopolymers, and make the extremely reasonable jump to ancient people in places with the right combination of salts could make water glass and both dissolve and form granite. Granite is an aggregate, so if you just take sand from places where people mined monolithic granite objects, you can use water glass to chemically melt the quartz, turn the sand into a soft polymer that takes a week to fully cure back into what looks like granite from the same quarry.
Works for limestone as well. So when you consider the likelihood that pyramid blocks were likely simply cast in place with readily available materials, it sort of makes you angry at the traditionalists that say everything was carved, and the ancient aliens people.