In this video, a person is seen holding a knife in their hand. The knife has a black handle and a silver blade. The person demonstrates how to open and close the knife, using their thumb to flick the blade open and close. The background is black, and the focus is on the person's hand and the knife. The person's hand is steady, and they handle the knife with care. The blade of the knife appears to be sharp, and the handle is textured for a better grip. The person's thumb moves quickly and smoothly as they open and close the knife.