I hope most who see that show/video and laugh at it, have watched the show before to know those two characters hateful, spiteful, comedic dynamic, or see it as just the comedy of a cranky, old man calling, I believe his sister in law, gorilla faced just to be mean/derogatory towards her good looks or lack thereof(the writers made her appear more frumpy for lack of another word, just for this reason). Now, not saying that kind of humor is everyone's cup of tea, but I think most would agree that generally that is kinda what makes the skit funny. Nasty old junk man, berating(and threatening her with violence, unfortunately, more "accepted" and common at that time in history.) his outspoken, pushy sister in law. Lots of folks can relate with an in-law that they loathe or fight with, or at least see some humor, minus the domestic violence threat.
Where it gets ugly is the unfortunate minority of people that find this funny and ok because they equate a black person with a gorilla, which is what we have seen yet again with Roseanne's tweets. It is not ok in our modern society to think this is funny because, "Hurr, durr, blacks ARE gorillas".
If someone can't understand that they cannot use phrases like, dago, guinea, wop, nigga/er, coon, and all the other racial/ethnic slurs, like their own, and justify it by saying, "What, why can't I use "insert your favorite slur" like they do themselves?", I don't know what to say other than ur a cunt, and you deserve to lose your tv show, get called out in public,etc., whatever consequences may come, I feel not for you, other than sadness for those you caused pain to, and the decent people who may have to deal with you, family, friends, co-workers.
I heard my uncles, when I was little, use some derogatory words amongst themselves(Italians using wop/guinea/dago). I was aware, by common sense/good upbringing, from a young age to know that saying that wasn't acceptable if you were outside our ethnicity. I wasn't taught it was okay to use other groups words for themselves in my vernacular.
Also, this has zero to do with politics...hate is hate, and stupid is stupid.
@OldNewbie -- not directed at you, but to the "only those people can be racist" comment in your post.