In the video, a man is seen holding a bag of water and pouring it into a fish tank. The fish in the tank swim around as the water is poured in. The man continues to pour the water until the tank is full. The fish seem to be enjoying the new water, swimming around and exploring their surroundings. The tank is filled with various types of fish, including some that are brightly colored and others that are more subdued in color. The water in the tank is clear, and the fish are visible through the glass. The man pouring the water is wearing a blue shirt and appears to be focused on the task at hand. Overall, the video captures a moment of care and maintenance for the fish tank, with the fish appearing healthy and active.