A music video is a video that integrates a song or an album with imagery that is produced for promotional or musical artistic purposes. Modern music videos are primarily made and used as a music marketing device intended to promote the sale of music recordings. These videos are typically shown on music television and on streaming video sites like YouTube, or more rarely shown theatrically. They can be commercially issued on home video, either as video albums or video singles. The format has been described by various terms including "illustrated song", "filmed insert", "promotional (promo) film", "promotional clip", "promotional video", "song video", "song clip", "film clip", "video clip", or simply "video".

While musical short films were popular as soon as recorded sound was introduced to theatrical film screenings in the 1920s, promotional music videos started becoming popular into the 1960s and the music video rose to prominence in the 1980s when American TV channel MTV based its format around the medium.

Music videos use a wide range of styles and contemporary video-making techniques, including animation, live-action, documentary, and non-narrative approaches such as abstract film. Combining these styles and techniques has become more popular due to the variety for the audience. Many music videos interpret images and scenes from the song's lyrics, while others take a more thematic approach. Other music videos may not have any concept, being only a filmed version of the song's live concert performance.

In 1894, sheet music publishers Edward B. Marks and Joe Stern hired electrician George Thomas and various artists to promote sales of their song "The Little Lost Child". Using a magic lantern, Thomas projected a series of still images on a screen simultaneous to live performances. This would become a popular form of entertainment known as the illustrated song, the first step toward music video.

With the arrival of "talkies" many musical short films were produced. Vitaphone shorts (produced by Warner Bros.) featured many bands, vocalists, and dancers. Animation artist Max Fleischer introduced a series of sing-along short cartoons called Screen Songs, which invited audiences to sing along to popular songs by "following the bouncing ball", which is similar to a modern karaoke machine. Early cartoons featured popular musicians performing their hit songs on camera in live-action segments during the cartoons. John Logie Baird created Phonovision discs featuring Betty Bolton and other singers from the 1930s. The early animated films by Walt Disney, such as the Silly Symphonies shorts and especially Fantasia, which featured several interpretations of classical pieces, were built around music. The Warner Bros. cartoons, even today billed as Looney Tunes and Merrie Melodies, were initially fashioned around specific songs from upcoming Warner Bros. musical films. Live-action musical shorts, featuring such popular artists as Cab Calloway, were also distributed to theaters.

Blues singer Bessie Smith appeared in a two-reel short film called St. Louis Blues featuring a dramatized performance of the hit song. Numerous other musicians appeared in short musical subjects during this period.

Soundies, produced and released for the Panoram film jukebox, were musical films that often included short dance sequences, similar to later music videos.

Musician Louis Jordan made short films for his songs, some of which were spliced together into a feature film, Lookout Sister. These films were, according to music historian Donald Clarke, the "ancestors" of music video.