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WebM is an audiovisual media file format. [5] It is primarily intended to offer a royalty-free alternative to use in the HTML video and the HTML audio elements. It has a sister project, WebP , for images.
The adoption of HTML audio, as with HTML video, has become polarized between proponents of free and patent-encumbered formats. In 2007, the recommendation to use Vorbis was retracted from the HTML5 specification by the W3C together with that to use Ogg Theora, citing the lack of a format accepted by all the major browser vendors.
Some are combinations of common container formats and audio and video coding profiles, such as AVCHD and DivX formats. Although sometimes compared to DivX products, Xvid is neither a container format nor a video format, it is a software library that encodes video using specific coding profiles of the common MPEG-4 ASP video format.
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All modern browsers will play video (Theora and WebM) and audio (Vorbis and MP3) files from Wikipedia, no modifications needed. On older iOS, iPadOS, and macOS devices, software decoding will be used. This might be a bit slow compared to what you are used to on such devices. Internet Explorer is NOT supported.
Original file (WebM audio/video file, VP8/Vorbis, length 3 min 0 s, 1,280 × 1,024 pixels, 682 kbps overall, file size: 14.61 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Original file (WebM audio/video file, VP9/Opus, length 2 min 29 s, 1,920 × 1,188 pixels, 1.52 Mbps overall, file size: 27.06 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Ogg (standard container for Xiph.org audio formats Vorbis and Opus and video format Theora) RM (RealMedia; standard container for RealVideo and RealAudio) WebM (subset of Matroska, used for web-based media distribution on online platforms; container for royalty-free audio formats Vorbis/Opus and video formats VP8/VP9/AV1)