In this video, a man is seen standing in front of a whiteboard. He is wearing a black shirt and is holding a marker in his hand. The man is drawing a diagram on the whiteboard, which appears to be a graph with arrows pointing in different directions. The man is actively engaged in drawing and explaining the diagram, as he moves the marker back and forth on the board. The whiteboard is the main focus of the video, and the man's actions are the primary activity. The video does not contain any other objects or people, and the background is not visible.