Video art is a relatively new artistic medium which came about in the 1960s and 70s. Unlike its close relative, film, it does not rely on theatrical convention. Video art is often devoid of actors, dialogue, and plot, focusing instead on the qualities of image and sound. Many video artists create large scale installations in which multiple television or computer screens are grouped together into a larger vision which may contain other artistic elements such as sculpture. One of the pioneers of video art was the Korean American artist Nam June Paik, featured in the video below from a retrospective of his work at the Tate Gallery Liverpool titled Noise.