Dear Mark,
As always, thank you so much for your labors. It generally takes me a few times watching your videos to pick up on the knowledge contained. I'm sure I'll be watching this one more than once.
It makes me happy to see things like this. In the modern era of atomic watches and $1 quartz movements, true timepieces cannot survive on physical properties alone. Much like other fine arts, horology will live and die by the passion and accessibility of its practitioners. Perhaps a bit philosophical for an internet forum, but videos like this go a long way towards that goal.
Take care, all the best,
Mute