Yeah, this is pretty impressive. This is a guy using only "period" methods to forge a Celtic-style spearhead out of a three-layer billet of iron. I'm particularly interested in the part where he forges the cone-shaped socket of the spearhead. I bring it up because a few days ago, I helped some kids research how to forge viking-age arrowheads for the exhibit by Freya Roe, to be held in early March, and our research revealed that viking arrowheads had not a socket construction, but rather a tanged construction, meaning that they were forged with a simple tang and driven into the arrow shaft, which was then reinforced with a binding.
So anyways. Got the video from here: http://blacksmith.org/forums/threads/841-Forging-a-Stake-Anvil