In the video, a man is standing in front of a chalkboard. He is wearing a suit and tie and is holding a piece of chalk in his hand. The man is speaking to the camera and appears to be giving a lecture or presentation. The chalkboard behind him has some mathematical equations written on it. The man is gesturing with his hands as he speaks, and at one point, he throws the chalk in the air. The video is shot in a classroom or lecture hall setting.