This is the song "Der Fuehrer's Face" written by Oliver Wallace and this specific version of the song preformed by Spike Jones and his City Slickers. Another version of this song was also featured in the 1943 Walt Disney cartoon by the same name, originally called "Donald Duck in Nutzi Land". Since the Medic is German, I felt like this would fit well, it's just for fun, not supposed to match up or anything.
There's more music than the preview suggests, file limit prevents me from putting more of the song in the preview
This is not a form of "Nutzi" propaganda, the song was originally used as a form of Anti-"Nutzi" propaganda, and this mod is just for fun.