Obviously this is nothing new, but you can clearly see that the street gangs(not Cartels, but the street gangs) in Latin America are largely heavily influenced by USA gang culture. The way they dress, the gang signs, the music, etc.
In fact, those clowns in the video, who took hostages live on TV, appear to be a street gang, but are committing a crime with the level of organisation expected from a Cartel. I'm guessing the Cartels have the street gangs working for them.