In the video, a person is holding a digital caliper and measuring the width of a knife. The knife is black in color and is placed on a black surface. The person is using the caliper to measure the width of the knife from one end to the other. The digital display on the caliper shows the measurement in millimeters. The person is holding the caliper with both hands and appears to be taking multiple measurements to ensure accuracy. The video is shot in a well-lit room, and the focus is on the person's hands and the knife.