Mary, Princess Royal and Countess of Harewood, is a distinctive figure in the realm of early cinema, particularly noted for her role in the groundbreaking silent film, *Children of the Royal Family of England* (1900). This film is a rare gem in the world of physical media, capturing the royal children in an intimate portrayal that reflects the era's cinematic innovation. Collectors are drawn to this title not just for its historical significance, but also for its limited availability on formats like VHS and DVD, making it a prized possession for enthusiasts of royal history and silent film. Her contributions to film, though few, encapsulate a unique intersection of royalty and early cinematic art, which intrigues collectors who appreciate the blending of cultural history with media. As home video releases of her work remain scarce, titles featuring her performance continue to rise in value, solidifying her legacy in the annals of film history and making her an intriguing subject for both collectors and scholars alike.