In the video, a woman is seen sitting on a yoga mat in a room with a large window. She is wearing a white top and blue leggings. The woman is demonstrating how to perform a proper sit-up exercise. She starts by sitting up straight with her legs extended in front of her and then brings her knees to her chest while keeping her back straight. She then lowers her knees back down to the mat and repeats the motion several times. The woman's movements are slow and controlled, emphasizing the importance of proper form when performing this exercise. The room is well-lit, and the woman's movements are the main focus of the video.