The video is about a tennis tutorial and drill by Edgar Giffenig.  There are two lady tennis players on a clay court who are demonstrating how to throw the ball up high to the partner.  The player is shuffling behind the net and turning the racquet upside down in between the shots.  Then the players demonstrate another drill as they shuffle on the tennis court in between shots and returning the balls.  The player bounces the ball back with the tip of the racquet handle.  They continue playing while demonstrating the tennis drill.