The video shows a person using a machine to sharpen a knife. The person is holding the knife with one hand and using the other hand to move the knife back and forth across the machine's surface. The machine appears to be a grinder or sharpener, and it is producing a lot of sparks as the knife is sharpened. The person's movements are steady and controlled, and they seem to be experienced in using the machine. The knife is a large kitchen knife with a silver blade and a black handle. The machine is black and appears to be made of metal. The background is not clearly visible, but it seems to be a workshop or garage setting.