Primitive Technology: Iron Bacteria Cement [video]
If you're new to Primitive Technology then it's worth starting from the oldest videos and working forward. These aren't just random tasks he sets himself. He starts by going into the Australian jungle with absolutely nothing except cargo shorts (not even shoes) and then proceeds to build himself a series of shacks and houses, starting with nothing more than a sharp stone and various plants. Then he starts building kilns and firing clay he digs out of the river bank (with a stick) making pots, bricks and roof tiles. Then he starts making charcoal and building a forge, so he can turn the iron bacteria in the creek into actual forged iron objects. He's been at it for years initially as a hobby and now he earns enough to make it his "job". He doesn't attempt to recreate the paths taken by ancient people - he's willing to use modern scientific knowledge - but he does appear to live by his rule of not taking anything with him and just using only the natural resources around him.