A film trailer is a short video used to market upcoming feature films. Originally, trailers were promotional reels shown before musicals to raise awareness. The first official movie trailer was created in 1914 to promote Charlie Chaplin's film "The Tramp". Throughout the 1950s and 60s, film companies contracted the National Screen Service to create trailers, which consisted of clips, narration, music, and text. Andrew J. Kuehn revolutionized film trailers in the 1960s, developing impactful trailers for films like "Jaws" and "Indiana Jones" through fast pacing and innovative editing styles.