hello Dave,
I seem to remember reading the video was shot in Northern Brazil , so not much in the way of health and safety there !!!
The first thing I made properly in my forge , was a draw knife . Made out of an old landrover leaf spring , and yes quenched in used car oil...lol. Then a couple of cold chisels out of straightened coil spring . Being a wimp , I had to use a 2lb hammer to work with mainly . The lump hammer nearly killed me . Good fun and very satisfying to turn scrap into something usefull , but to do it all day like those guys ....think I'll give that a miss.
cheers
Russ