A couple interesting facts shown in there.
they handled lead - that probably wouldn't be allowed today.
the industry went away from soldered on toneholes - a players saliva attacks the solder causing leaks.
the neck is filled with lead before being "punched" into shape
The video is nice historically as it shows each piece of the saxophone. Selmer France has a shorter, more modern video too somewhere on the web
fyi, when you get to the sandblasting section - does that look like granny in the background working on a sax?
plus rare video of Adolphe Sax making the saxophone ... okay, probably contrived a bit.