According to the backinfo I got, the two men in the video are being interrogated by FARC, which would suggests the video is from Colombia. FARC are “Fuerzas Armadas Revolucionarias de Colombia“, or Revolutionary Armed Forces of Colombia. Unless another group from a different country also goes by FARC.
While the two still live guys are being interrogated, a third is shown as a heap of flesh and bones, still being actively dismembered. Can’t imagine it was that pleasant for the two watching their buddy get chopped up, knowing similar fate likely awaits you too.
Props to Best Gore member @natural-selection-2 for the video: