Underwater pool swim session in Markovskiy, Russia

The video shows an underwater view of a person swimming in a pool. The person is wearing a red swimsuit with white stripes and a white swim cap. They appear to be performing a series of aquatic movements, including what looks like a backflip or somersault. The water is clear and blue, and the pool has lane markers on the bottom. There are some air bubbles visible, indicating movement in the water. The lighting suggests it is daytime. The setting is clearly an indoor swimming pool, likely in Марковский, Russia. The overall impression is one of athletic performance and aquatic training.