Microsoft revealed the upcoming Windows 10 Anniversary Update will deliver numerous new features and enhancements for the Edge browser, including support for Google's WebM video format. This codec is used by YouTube and a lot of other popular sites so a lot of users have been anxious for the software giant to add support to its Edge browser.
Originally, WebM, VP9 and Opus support were announced last year in September, but they haven’t shown up until now. Thankfully the latest versions of Edge, found in Redstone builds, does support WebM technologies and the two codecs, though this is still hidden behind an experimental flag.
To see if this feature is enabled for you, you must first check that you’re running Edge 14.14291 or newer, with that last number being in line with Windows 10 Insider builds versions. Then you need to type about:flags in the address bar and check under Media Source Extensions.
At present, support is only available in desktop beta builds of Windows 10 as there are concerns about battery usage on mobile devices.