The early 20th century marked the beginning of the entertainment industry as we know it today. Silent films, accompanied by live music, were the primary form of mass entertainment. With the advent of sound in films, the industry witnessed a revolutionary change, giving birth to Hollywood, the mecca of the American film industry. Documentaries like "The Hollywood Studio System" (2007) shed light on how major studios controlled every aspect of film production, distribution, and exhibition, establishing a monopoly that would shape the industry for decades to come.