Zlatko Grgić is celebrated in the world of physical media for his unique contributions to animated film, particularly through his work with the Zagreb School of Animated Films. One of his standout projects, "Deep Threat" (1977), showcases his distinctive storytelling and animation techniques, making it a sought-after title for collectors who appreciate the evolution of animated cinema. Grgić's earlier work, "Muzikalno prase" (The Musical Pig), which won the Palme d'Or for Best Short Film at Cannes in 1965, further underscores his importance in the animation landscape. Collectors are drawn to Grgić's films not only for their artistic merit but also for their historical significance. His involvement in the beloved animated series "Professor Balthazar" (1967–1978) has cemented his legacy, and the show's various home video releases are prized by those who cherish classic animation. Grgić's innovative style and storytelling continue to resonate, making his works essential additions to any serious collector's library.