The video shows a swimming competition in a pool with multiple lanes. Swimmers are seen competing in the backstroke, with their arms moving in a circular motion and their legs kicking backward. The pool is divided into lanes by floating lane dividers, which are yellow and blue in color. The swimmers are wearing swim caps and goggles. The water is a clear blue color, and the pool area is surrounded by spectators and officials. The swimmers are moving at a fast pace, with splashes of water visible around them.