GIANT SNAKE KILLS TEEN GIRLS – Fake or Real?

Warning: Graphic content.  The girls were real enough. They were two teenagers from southern Brazil. They went with friends to go swimming in a local river. Everyone was having a good time, until one of the girls screamed. Then the other girl screamed and seconds later they were both gone!
It was recorded on a cell phone, and looks pretty authentic, but is this for real or is it fake?
Warning: Graphic content. But it might not be real graphic content.