I find this thread itself interesting, because I didn't get the humor in the posted video at all. I mean, I get it's a parody of what I guess is stereotypical NYC Jewish mother behavior. But it's not funny to me, most likely BECAUSE a) I'm not Jewish, 2) grew up like 2000 miles from NY, and iii) have never even lived anywhere close. So for me, it's just someone doing an accent acting as a CFI. Not funny to me at all.
BUT, at least I realize that there are many different types of humor, and just because I don't get it doesn't mean it's not hilarious to somebody else - and judging by this thread, those who grew up around that stereotype find it really funny - which is amazingly interesting to me, because I don't get it at all.
But "me getting it" is not a requirement for something to be funny to others.