There is a newer YouTube video that was uploaded earlier this month
about the Welte orchestrion at Zaharakos Ice Cream Parlor and Museum
in Columbus, Indiana.

The video goes into some detail about Welte orchestrions as well as
the Welte "Lichtton-Orgel".  The video takes a somewhat different
approach towards mechanical music, but is worth watching nonetheless.
It is titled "Melodic Machinery -- A Brief History of the Zaharako's
Welte Orchestrion" and it can be viewed at
http://www.youtube.com/watch?v=xMYdZ3R96nA 

Mike Roseboom