Xvid-encoded video files have been around for a while. They are a popular file choice because they are encoded using MPEG-4 technology, which saves disk space without sacrificing quality. Think of HD video quality and a full-length movie - all of these can be stored and the files can be played back on different devices - like mobile phones or a DVD player. Xvid makes both data transmission and storage of video files easy to do and efficient. It is available on operating systems including Mac, Windows, and Linux. This file type is also preferred by web developers who are building and coding websites as it allows them to save on bandwidth and storage.