In the video, a person is seen using a level to ensure that a brick wall is straight. The person's hand is visible, holding the level against the wall. The level is a long, straight metal rod with a bubble in the center that moves up and down to indicate whether the wall is level or not. The person adjusts the level until the bubble is centered, indicating that the wall is perfectly level. The bricks are a reddish-brown color and are laid in a staggered pattern, which is typical for brick walls. The background is a construction site with other bricks and construction materials visible.