Most of these videos are available on Vincent Liaudet Youtube page:
https://www.youtube.com/user/vacilon19601/videos

Brass instruments repair training:

Removing dents :

Magnetic :

Bell :

Slide :

Hagmann barillet maintenance :

Conical tube manufacturing (lead pipe) :

Saxophone key manufacturing:
This principal can be used to manufacture a water key or a rotating valve key, etc...

 

Silver plating :