Watched the two BBC4 Handmade films last night. The glass jar one being the easier to follow, IMHO, as we seemed to see the whole process. The knife one covered 15 hours in 30 minutes, so was a bit more disjointed to my eye.
Shame they didn't at least name the glass designer's assistant in the credits and I would've liked to have seen more of the knife blade once finished, but an interesting concept with not a word of commentary to get in the way of the processes being filmed.