NIce video, although I didn't watch it all due to broadband usage. I have a holster from a local saddle maker, Jim Burke, who sadly passed away several years ago. He did the hand cutting thing...his dad taught him how to do it.
I also have a few El Paso Saddlery holsters...they took over the old S.D. Myres company. I'm sure they are not made now the way Tio Sam made them, but they are still very high quality holsters.
Leather working is one of my hobbies, and I especially enjoy making holsters. This is the same process I use. It's a really fun and relaxing hobby even if it is tedious at times. It's really rewarding to see the finished product come to fruition.