The video captures a large whale shark swimming in an aquarium tank. The whale shark is the main focus of the video and is seen swimming slowly and gracefully. The tank is filled with clear blue water, and several smaller fish can be seen swimming around the whale shark. The video is shot from the perspective of an onlooker, with the silhouettes of several people visible in the foreground, watching the whale shark. The lighting in the aquarium is dim, highlighting the whale shark and creating a serene atmosphere.