He was using the rev limiter like a horn. Its no different really than harley riders just turning on their straight pipe bikes....
I speak portugeuse and recognize his accent. Yes he is a squid and was calling every other person a CARALHO which means dick/asshole
He was a little amusing with his diatribe about how this is his city. Realistically I dont know how many of you have driven in Sao Paolo or in a European city but lane splitting traffic on side streets and street corners and sidewalks etc is VERY commonplace. I was riding a 50CC motobecane like that when I was 9 trough the streets of Sao Paolo and Buenos Aires. My vespa in later years was a little more nimble.
Again I do think he was an idiot for abusing his valvetrain like that but the honking and aggressiveness isnt rare.
Hell The 101 and 405 in the early 90s when I lived there werent too far off.