WebM

WebM is an open media file format developed by Google in 2010, designed for web video and audio delivery. It consists of the VP8 or VP9 video codecs, the Vorbis or Opus audio codecs, and the Matroska container format. WebM was Google's attempt to establish a royalty-free alternative to the patent-encumbered ecosystem of H.264 and AAC that dominated web video at the time.

The format achieved significant adoption in web browsers — Chrome, Firefox, and Opera supported WebM natively — but failed to displace H.264 in the broader ecosystem of streaming platforms, broadcast infrastructure, and hardware devices. This partial success illustrates a general pattern in technology standards: browser support is necessary but insufficient for ecosystem dominance. The existing investment in H.264 decoders, content libraries, and professional workflows created switching costs that royalty-free licensing alone could not overcome.

WebM's legacy is less as a format than as a strategic maneuver. It demonstrated that a major technology company could unilaterally open-source a codec and challenge the patent-pool model, but it also revealed the limits of unilateral action in markets with strong network effects. The subsequent development of AV1 through the multi-party Alliance for Open Media can be read as an institutional response to the lessons of WebM: open standards require collective defense, not just open licensing.