In this video, a person is seen writing on a whiteboard with a black marker. The person is writing a chemical formula, which appears to be a complex molecule. The video is shot from a close-up angle, focusing on the person's hand and the whiteboard. The person's hand is steady, and they appear to be knowledgeable about the subject matter, as they write with confidence and precision. The chemical formula is written in a clear and legible manner, with each element of the formula clearly separated and labeled. The video does not contain any other objects or people, and the background is plain and unobtrusive. The overall tone of the video is educational and informative, providing a clear and concise explanation of the chemical formula being written.