With only a week and a half until its kickoff in NYC, the Mad Decent Block Party 2011 promo video is up. The Philly stop of the four-city tour will take place on August 6th from noon-8 p.m. at the Starlight Ballroom. Performing at the outdoor extravaganza will be Diplo and Das Racist, along with PO PO, DJ Sega, Brick Bandits, Paul Devro, Kito, and Luvstep (Dirty South Joe & Flufftronix). Admission to the all-ages event is free; you can RSVP to guarantee a spot here.