The video shows a fish tank with a black catfish swimming around. The catfish is the only fish in the tank, and it is swimming around the tank, which is filled with blue gravel. The catfish has a long, slender body and a pointed snout. It moves gracefully through the water, occasionally turning its body to show its dorsal and pectoral fins. The tank appears to be well-maintained, with clean water and no visible algae or debris. The lighting in the tank highlights the catfish's sleek body and the vibrant blue color of the gravel.