The video begins with a person pouring water into a clear glass jar placed on a wooden surface. The water level rises as more water is added. Then, the person pours a dark liquid into the jar, filling it up to a certain level. The person then adds more water to the jar, causing the dark liquid to mix with the water. The person continues to add water until the jar is full. The video ends with the person shaking the jar, causing the water and dark liquid to mix together.