The video shows a close-up of a person's hand with a focus on their fingernails. The person is using a small brush to apply a clear, glossy substance to their nails. The brush is dipped into a small container of the substance, and the person carefully applies it to each nail, making sure to cover the entire surface. The person's hand is steady, and they seem to be experienced in this task. The substance appears to be a type of nail polish or nail treatment, and the person is likely applying it to keep their nails healthy and looking good.