The fundamentals of this technique

Two men stand facing each other in a room, one in a grey shirt and the other in a black long-sleeved shirt, both holding their fists up in a fighting stance. The man in the grey shirt repeatedly raises his right arm to his forehead in a mock salute or defensive gesture while the man in black maintains his stance, and a woman in a black dress stands in the background observing. The scene repeats in a loop.