The video shows a close-up of a person's hand using a paintbrush to apply a green substance to a tree. The substance is being applied to a specific area of the tree, and the person is carefully spreading it around. The tree has a rough texture, and the green substance contrasts with the brown color of the tree. The person's hand is steady, and they seem to be experienced in applying the substance. The video does not provide any context or information about the purpose of the substance or the type of tree.