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