<audio>
and <video>
tags without Javascript.video/webm;%20codecs=%22vp9,vorbis%22
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://woolyss.com/f/spring-vp9-vorbis.webm" type='video/webm;%20codecs=%22vp9,vorbis%22'>
</video>
HTMLMediaElement.canPlayType('video/webm;%20codecs=%22vp9,vorbis%22')
→ MediaSource.isTypeSupported('video/webm;%20codecs=%22vp9,vorbis%22')
→