Sorry this reply seems to come a long time after the trip.
The mobile film fest was great. I spent time with the VJ's who contributed to the Tropicalia Fest in the Barbican some years back.
My hosts were in to "roots samba" and we saw Vehla Guarda Da Portela.
Also I went to a Saturday morning craft market where there were some great guys playing Chorro - regular feature apparently. Had to be whisked away to have Feijoda for lunch in the Brhama bar in the city centre accompanied by an (ok) samba band and much dancing on the tables.