The documentary "The Hollywood Studio System" (2006) provides a comprehensive overview of the early days of the entertainment industry. During the 1920s to 1960s, the major studios, such as MGM, Paramount, and Warner Bros., dominated the film industry, producing a vast number of movies that captivated audiences worldwide. This period, often referred to as the Golden Age of Hollywood, was marked by the rise of the studio system, where actors, writers, and directors were contracted to specific studios, and the production process was tightly controlled. The studios produced films that were designed to appeal to a broad audience, with a focus on escapism and entertainment.