In the video, a person is seen arranging various decorative items inside a glass aquarium. The person is placing a piece of driftwood, some moss, and a few other decorative items inside the aquarium. The aquarium is already filled with water and has a few other decorative items already in place. The person is carefully placing each item in the aquarium, making sure they are secure and properly positioned. The aquarium is well-lit, and the water is clear, allowing for a good view of the items being placed inside. The person's movements are deliberate and precise, indicating a level of care and attention to detail in the arrangement of the aquarium.