Here is a description of the video: A young woman is performing a dumbbell tricep extension exercise on a weight bench in a gym. She is lying on her back with her feet planted on the floor. She holds a light blue dumbbell with both hands, extending it overhead and then lowering it towards her forehead while keeping her elbows stable. She is wearing a red t-shirt, white shorts with yellow stripes, and has a black bracelet on her left wrist. The weight bench is silver and black. In the background, there are several racks of dumbbells and various workout machines. The floor is a light brown wooden surface. There is conversation in the background.