There is a large number of people, who should not be allowed to do Beatles covers, William Shatner and Ringo Starr are among them. There must be many different covers of Yellow Submarine in german or any other language out there ranging from godawful to funny to actually not that bad. To let us in on the joke could maybe go a bit more into details?
The only german Yellow Submarine version I can spontaneously think of, is the one they use to sing in soccer stadiums to mock the bavarians. "Zieht den Bayern die Lederhosen aus!" (Strip the bavarians of their leather-pants!) It is probably a good thing, that Doug does not understand German as I don't want to imagine what his powers would make of that.
The only german Yellow Submarine version I can spontaneously think of, is the one they use to sing in soccer stadiums to mock the bavarians. "Zieht den Bayern die Lederhosen aus!" (Strip the bavarians of their leather-pants!) It is probably a good thing, that Doug does not understand German as I don't want to imagine what his powers would make of that.