In the video, a man is seen holding a large black watering can over a fish tank. He tilts the can and begins to pour water into the tank, which is filled with various types of fish and plants. The man carefully pours the water, ensuring that the fish and plants are not harmed by the water. The fish swim around in the tank, and the plants sway gently in the water. The man continues to pour water into the tank until it is full, and the fish swim around happily.