For english viewers: Portela (his name) is a friend of mine and a well seasoned cyclist with many years and titles on professional cycling. He knows exactly what he's doing.
The video was recorded during a road training session near Curitiba, Paraná - Brazil.
This is a raw file from a GoPro camera where we only added the music.
There is no special support for the camera, he placed it on the back of the truck on a very primitive way.