In the video, a person is seen holding a glass of water. The glass is filled with water up to about three-quarters of its height. The person then drops a red object into the water. The object appears to be a small container or a toy. The person then proceeds to pour water from a bottle into the glass, causing the water level to rise. The red object is then seen floating on the surface of the water. The person continues to pour water into the glass, and the red object remains afloat. The video ends with the person stopping the pouring of water.