British Airways B747 Sao Paulo GRU - Push back, Start up, Taxi and Take off / Decolagem

-Flight BA246 from São Paulo Guarulhos (SBGR/GRU) to London Heatrow (EGLL/LHR), about 11 hours of flight.
-From the start of the video to 6:40 the camera was not focus...(sorry)
-Aircraft: Boeing 747-436 G-BYGC (cn 25823/1195)