According to the backinfo I got, the video shows members of the Yeico Masacre gang from Venezuela beheading a rival from the Willy Melean gang. The beheader uses a meat cleaver of questionable sharpness, so the entirety of the decapitation is not shown.
With the head eventually severed and used for photo ops, the head is thrown into a small hole and buried. By the looks of it, the rival was already dead when the beheading commenced.
Props to Best Gore member @3asbaaaa for the video: