WebM is focused on addressing the unique needs of serving video on the web. Existing video formats were designed to serve the needs of these mediums and do it very well. Serving video on the web is different from traditional broadcast and offline mediums. WebM is 100% free, and open-sourced under a BSD-style license. With video being core to the web experience, a high-quality, open video format choice is needed. A key factor in the web's success is that its core technologies such as HTML, HTTP, and TCP/IP are open for anyone to implement and improve. The WebM file structure is based on the Matroska container. WebM files consist of video streams compressed with the VP8 video codec and audio streams compressed with the Vorbis audio codec.
WebM defines the file container structure, video, and audio formats. WebM is an open, royalty-free, media file format designed for the Web. WebM for Quicktime is a video component which provides WebM support on the Mac platform.
