According to the backinfo I got, the altercation captured in the video features two Venezuelan man. One of them appears to deliver a single stab to the chest of the other, penetrating the victim’s heart area.
Despite obvious difficulty, the stabbed victim tries to follow the stabber, but seconds after the stab collapses. Apparently, he died from the wound, which would not surprise me.
Props to Best Gore member @cesarfenco for the video: