In the video, a man is standing in front of a whiteboard with a diagram on it. He is wearing a light blue shirt and a dark blue tie. He is speaking to a group of students who are sitting in front of him. The students are wearing red and black clothing. The man is holding a piece of paper in his hand and is pointing at the diagram on the whiteboard. The whiteboard has a diagram of a triangle with arrows pointing to different parts of it and the words "total rise" written on it. There is also a speech bubble on the whiteboard with the words "ignore the 'over hang'".