In the video, a person is holding a rock and using their thumb to scrape the surface of the rock. The rock appears to be dark in color and has a rough texture. The person's thumb is visible, and they are using it to scrape the surface of the rock, possibly to remove any dirt or debris. The background is not clearly visible, but it appears to be an outdoor setting with natural light. The person's actions are deliberate and focused on the rock, suggesting that they may be trying to clean or examine it.