In the video, a person is seen preparing a burger in a kitchen. The person is using a knife to spread ketchup on a bun, then places a tomato slice on top of the ketchup. Next, the person adds a lettuce leaf on top of the tomato slice. The person then places a patty on top of the lettuce. The person then adds another tomato slice on top of the patty. Finally, the person places another bun on top of the patty to complete the burger.