In the video, a person is writing on a whiteboard with a black marker. The whiteboard has various mathematical equations and diagrams written on it. The person is writing down the equations and diagrams in a clear and organized manner. The whiteboard is placed on a wall, and the person is standing in front of it while writing. The person appears to be focused on the task at hand, and the writing is neat and legible. The video does not contain any audio or additional visual elements.