Me too, I'm from Santa Catarina and we are not like that. I googled xenophobic and saw that it can be used for people of the same county, maybe it was wrong I don't know.
The point is that people from the north of Brazil tend to say bad stuff about us from the south, especially after the elections for president, like I said it's most political agenda then the truth.
Actually I'm from the city of the video, Florianópolis, apparently the guy from the video was drunk, but he refused to give a breathalyzer test. here is the source