A screencast is a digital video recording that captures actions taking place on a computer desktop. Screencasts, which often contain voice-over narration, are useful for demonstrating how to use specific operating systems, software applications or website features.
Screencast production requires some kind of video-capture software and a microphone. The software, which can be a desktop client or web-based service, captures and synchronizes the video and audio files and compresses the completed movie into a format that can be shared.
See also: screenshot
Screentoaster is a free web-based screencasting service for Windows, Macintosh and Linux computers.
Camtasia Studio, a popular Windows desktop client for screencasting, is known for its built-in editing tools.
Screenflow is a popular screencasting application for Macintosh computers.
Google used screencasts to help customers become familiar with their new user interface for video ads. (See screencast below.)