Yep, amazing, how with some very simple tools these humans can produce a product that is a basic building block of civilization. I counted 19 bricks for one team of two guys in two and a half minutes, that is 456 bricks an hour for two guys, if they work like that for 8 hours that is 3648 bricks a day, and there are two teams, so 7296 bricks, lets just say 7000 bricks a day for that four man team, impressive. The thing is I will bet you that not too many generations removed in any of our families, we had relatives who did similar kinds of work.
These guys work hard and have a system down pat, I hope they earn a decent wage for where they are etc.
Impressive for sure!