In this video, two men are standing in front of a whiteboard with mathematical equations written on it. The man on the left is wearing a black shirt and glasses, while the man on the right is wearing a striped sweater. The man on the left is pointing to the whiteboard and explaining something to the man on the right, who is listening attentively. The whiteboard has several mathematical equations written on it, including "h = Ra" and "EHL". The man on the left is using his hand to point to specific parts of the equations as he speaks. The video seems to be a recording of a math lesson or discussion.