Here's a detailed description of the video: The video shows two groups of people grappling on a gray mat in a large, well-lit room. The room appears to be a gym or training facility, with a high ceiling featuring industrial-style lighting fixtures. Supporting columns are wrapped in black protective material. Initially, two individuals, one wearing black leggings with a patterned design and the other in black shorts and a black t-shirt, are engaged in close-quarters grappling near the center of the mat. As the camera pans, another pair of individuals comes into view. These two are also grappling, with one wearing a gray t-shirt and black shorts, and the other wearing all black. Throughout the video, the individuals move around the mat, engaging in wrestling-style maneuvers. A third group of individuals briefly come into view at the end. Other details: A few flags are hanging on the wall and a logo is visible. There are padded poles leaning against the pillars. One person is wearing a blue gi, and is not engaged in the grappling.