Who is (or is not) playing Sousaphone in this German film

[David Richoux]

http://youtu.be/auUuoSbkVBg 1957 Albert Nicholas on clarinet - the film is named: "Die Grosse Chance"

I have no idea if the Sousaphone part is faked or not...

[Todd S. Malicoate]

It's as fake as fake can be. There's no tuba in any key that could play the tune being heard by alternating 1st valve, 2nd valve over and over.

[David Richoux]

I was watching the clip on my phone so I didn't see that. Any idea of the fake player's name? Or who was really playing the part?