<audio>
and <video>
tags without Javascript.video/ogg; codecs="theora,vorbis"
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://woolyss.com/f/theora-vorbis-caminandes-2.ogv" type='video/ogg; codecs="theora,vorbis"'>
</video>
HTMLMediaElement.canPlayType('video/ogg; codecs="theora,vorbis"')
→ MediaSource.isTypeSupported('video/ogg; codecs="theora,vorbis"')
→