Screencast
Screencast is a digital recording of computer screens, full screens or screen regions and usually comes with an audio narration to describe the on-screen actions. The term screencast dates back to 2004 with an interesting story.

In 2004, a columnist Jon Udell invited readers of his blog to propose names for the emerging genre. In all the suggested terms, Udell selected screencast, which was proposed by both Joseph McDonald and Deeje Cooley. His "Heavy metal umlaut" screencast is a well-known example - which explains how Wikipedia works.