<audio>
and <video>
tags without Javascript.video/ogg
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://upload.wikimedia.org/wikipedia/commons/transcoded/a/ab/Caminandes_3_-_Llamigos_-_Blender_Animated_Short.webm/Caminandes_3_-_Llamigos_-_Blender_Animated_Short.webm.1080p.ogv" type='video/ogg'>
</video>
HTMLMediaElement.canPlayType('video/ogg')
→ MediaSource.isTypeSupported('video/ogg')
→