How to Harvest amaranth grain (aztec rice)

Amaranth grain is somewhat like rice and was a staple food of the Aztecs. But most seem to grow like weeds and they are tough to harvest as well. If you've found some Amaranth plants and are looking at how to harvest the grain out of them, check out this video. He gives you an explanation of what Amaranth is and how to harvest the grains from it.