In the video, a woman is seen standing in front of a red curtain. She is wearing a purple tank top and gray leggings. The woman is demonstrating how to properly stretch the arms. She starts by standing with her arms at her sides and then raises them to shoulder height. She then crosses her arms in front of her chest and pulls them back, stretching her arms to the back. She repeats this motion several times, showing the proper technique for stretching the arms.