In the video, a person is seen holding a knife in their hand. They are using their thumb to push down on a button located on the handle of the knife. The person's other hand is holding a small metal piece that they are using to push down on the other side of the button. The knife appears to be a folding knife with a blue handle and a silver blade. The person's actions suggest that they are demonstrating how to open or close the knife using the button on the handle.