In the video, a person is seen holding a wooden plank against a white wall. The person then places a yellow level on the plank to ensure that it is straight. The level has a black handle and a bubble in the center that indicates the level of the plank. The person adjusts the plank until the bubble in the level is centered, indicating that the plank is perfectly horizontal. The person's hand is visible in the frame, and they appear to be wearing a black shirt. The background is a plain white wall with no other objects or decorations visible.