A question for German speakers (vs., accent, used)

[Mouldy Old Schmo]

Can you understand the Yiddish speaker?


Yiddish vs. German: an experiment. - YouTube

[viribusunitis]

I get the meaning, but I don't know certain words he said (the yiddish word for Großvater, ...). Plus, you certainly hear that he's not totally used to speak the language on a daily basis and that he has some sort of accent (probably English?).

Other German dialects are a lot harder to understand.