In the video, a man is seen standing in front of a whiteboard. He is wearing a headset and holding a marker in his hand. He is speaking to the camera and appears to be giving a presentation or lecture. The man then turns to the whiteboard and begins drawing a diagram. He draws a series of curved lines, which he then labels with numbers. The man continues to speak and gesture as he draws the diagram, explaining the process as he goes. The video ends with the man stepping away from the whiteboard, still speaking.