According to the info I got, this happened in Rocinha – the largest favela in Brazil (located in Rio de Janeiro). The video shows a pair of barefoot thugs opening a chest and ripping out heart from the corpse of a beheaded man. There appears to be a woman and another man behind the camera, having a laugh.
I don’t have much other information about why the victim was decapitated and why they felt the need to rip his heart out. But it’s quite remarkable how after one thug throws the heart on the bloody floor, that impact re-initiates its beating rhythm.
Props to Best Gore member @crybaby for the video: