What is a webm?

A WebM is a file format used for video and audio on the internet. It uses both the VP8 and VP9 video codecs and the Vorbis and Opus audio codecs. WebM is designed for use in HTML5 video and can be played in a web browser without the need for plugins or additional software. The format is popular with web developers and online video platforms due to its open source code and royalty-free licensing. WebM files can be recognized by their .webm file extension and can be created through a variety of software tools.