Over the last few years, youth in São Paulo have reinvented funk, a musical form born decades ago in Rio's favelas, and this new incarnation is flirting with mainstream success.

The beats have gotten people moving worldwide, but the controversial lyrics and the music's context are often little understood outside the poor outskirts of South America's city.

So to explain São Paulo funk, we asked KondZilla,a hugely talented and hugely influential music video director in Brazil’s funk scene, to come along with us and talk to the MCs, producers and young fans making it all happen.