In the video, a person is seen using a flat iron to straighten the hair of another person. The person doing the straightening is holding the flat iron in their right hand and using their left hand to hold the hair in place. The person whose hair is being straightened is sitting down, and the background shows a window with trees outside. The flat iron appears to be black, and the hair being straightened is dark in color. The person doing the straightening is moving the flat iron down the length of the hair, ensuring that it is straightened evenly.