The latest beta version of Google&s popular Chrome Browser supports the new open source AV1 video codec (in Main Profile 0), i.e. encoded videos can be played directly in the browser. The new capability comes with the Beta 69 of the Chrome Browser for Windows, Mac, Linux and ChromeOS - but it must first be explicitly activated via the flag "chrome://flags/#enable-av1-decoder". The main profile defines video with 8- or 10-bit color resolution and 4:2:0YUV chroma sampling. ISO-BMFF (MP4) is used as container format for the AV1 video files.
Additionally, Mozilla has recently implemented support for the AV1 codec in the Nightly version 63 of Firefox - the flag (media.av1.enabled to true) must also be explicitly activated here. AV1 will probably be official for all users in the release version Firefox 63, which will probably be released on October 23, 2018 - or in the Firefox version 64, which will be released on December 11, 2018. The Alliance for Open Media develops the open source video codec AV1, which includes influential companies such as Amazon, Apple, ARM, Cisco, Facebook, Google, IBM, Intel, Microsoft, Mozilla, Netflix and Nvidia. In March the official specifications were published. The AV1 codec should be up to 40% more effective than the HEVC/H.265 or 30% more effective than the VP9 codec and will replace the H.264 and H.265/HEVC video codecs subject to licensing in the future.
Google&s Chrome (Windows, MacOS, Android, iOS, ChromeOS) with a worldwide market share of over 60% is by far the most used browser - it supports a new format - as will soon be officially available in the next release version - such as the AV1 video codec, can play it at a stroke by a majority of network users. In addition, Firefox has a market share of over 10%. YouTube could therefore soon - as announced - start making its videos available in AV1 format. The benefit for Youtube would be the free use of the format and a significantly lower bandwidth for the streamed video data.