The video shows a large octopus swimming in the ocean. The octopus has long tentacles that are spread out in the water. The background is dark and murky, indicating that the video was likely taken in deep water. The octopus's skin appears to be a dark color, possibly black or deep blue, with some lighter spots. The tentacles are moving slowly and gracefully, suggesting that the octopus is exploring its surroundings. There are no other visible creatures or objects in the video, making the octopus the sole focus of the footage.