In the video, a person is seen holding a yellow sponge in front of a cage. A small rodent is inside the cage and is seen nibbling on the sponge. The person then moves the sponge away from the cage, and the rodent follows the sponge with its eyes. The person then moves the sponge back to the cage, and the rodent continues to nibble on it. The person then moves the sponge away again, and the rodent follows it once more. This action is repeated several times throughout the video.