In the video, a person is seen writing on a whiteboard with a marker. The whiteboard has a graph drawn on it, and the person is writing a mathematical equation next to the graph. The equation reads, "If period of least 3 x wave height = OK = comfortable ish." The person is writing in red ink, and the marker is black. The person's hand is visible as they write, and they appear to be right-handed. The whiteboard is positioned on a wall, and the background is not visible. The person seems to be explaining the equation, possibly in a classroom or educational setting.