The video shows a large sea turtle swimming in clear blue water. The turtle has a brown shell with a pattern of yellow and orange spots. It swims gracefully, moving its flippers in a slow, rhythmic motion. The turtle's head is visible, with its eyes and nostrils clearly seen. The water is calm, and there are no other creatures or objects visible in the video. The turtle appears to be alone, and there is no interaction with any other sea life or humans.