The video shows a person using a vacuum cleaner to clean a fish tank. The person is wearing blue jeans and is standing next to the fish tank. The fish tank is filled with water and has a filter on top. The person is using the vacuum cleaner to clean the gravel at the bottom of the fish tank. The vacuum cleaner has a long hose attached to it, which is being used to suck up the gravel. The person is moving the vacuum cleaner back and forth to ensure that all the gravel is cleaned. The fish tank appears to be well-maintained, and the water is clear. The person is focused on the task at hand and is making sure that the fish tank is cleaned thoroughly.