Great video, Paul. I appreciate your posts here on SS.
That fourth one is pretty amazing - the functional aspects of design are admirable, and it's great to get that good explanation of how the whole thing works. The hollowing out of the big old stump for that outhouse would have been big chore (and I say that as someone who has done a lot of chainsawing in his life). The burl toilet-seat cover is beautiful, by the way.