An interesting video and one of a large series on traditional hand tools.
Bit of background. I met Graham on the internet years ago. A number of years later, he was speaking at PopWood's seminar and I was working the AV. I was surprised he remembered me by name, even though we never met in person. He lived in Woodstock, NY at the time and was actually a musician in the Woodstock music festival 1969. He is an accomplished hand tool woodworker and wrote some books and articles for PopWood back in the day.
See:
Graham Blackburn books