In the video, a man is seen lying on his back on a mat. He is wearing black shorts and has a muscular build. The man is performing sit-ups, lifting his upper body off the mat and then lowering it back down. He is sweating, indicating that he has been exercising for some time. The mat is black with a yellow border, and there is a chain visible in the background. The man's movements are steady and controlled, suggesting that he is experienced with this exercise.