The video shows an elderly man with white hair and a striped shirt sitting in front of a bookshelf. He is speaking to the camera and making hand gestures. There is a whiteboard with a drawing of two cylinders in front of him. The man appears to be explaining something related to the drawing on the whiteboard. The bookshelf behind him is filled with various books, and there is a picture frame on the wall. The man seems to be in a room with a calm and quiet atmosphere.