In the video, a person is seen flipping through a notebook filled with handwritten notes. The notebook is open to a page with Korean writing and diagrams. The person's hand is visible as they turn the pages, revealing more notes written in the same language. The handwriting is neat and legible, and the diagrams are well-drawn. The notebook appears to be well-used, with some pages showing signs of wear and tear. The person's actions are deliberate and careful as they flip through the pages, indicating that they are looking for something specific.