WebM files can be opened by most browsers such as Chrome, Firefox, Edge because they are used by HTML5 to stream videos on the web.
WebM video format is also used by YouTube for videos, from 360p to higher resolutions.
WebM has similar compression and quality characteristics to other video formats. WebM can compress a lot and very little computer power is required to unzip the files which makes online streaming very easy. WebM is a video format which has the features to rewind and seek in the video with sound and is used to serve videos online. Google sponsors the development of WebM and is distributed under a BSD license. It is designed as royalty free (Royalty free means that the developers who work with the codecs have to pay for it, but the customers can view it for free) to be used in HTML5 video and audio as alternative for other formats like H.264. The structure of WebM is similar to the MKV file format which also stores both audio and video. WebM is a media file which stores both audio and video.
