Here are links to videos for the MTM method. Most of these free lessons are with Oscar Wegner, likely the most renowned tennis coach in the world. He has coached internationally ranked players, has developed tennis programs for entire countries, and advised Venus and Serena’s father on how to develop them into the best female players of all time.
Video Lesson #1: The Forehand Groundstroke
Video Lesson #2: Two-Handed Backhand
Video Lesson #3: The Volley
Video Lesson #4: The Serve