<audio>
and <video>
tags without Javascript.video/x-matroska
<video preload="auto" controls="controls">
<source src="https://woolyss.com/f/caminandes-1-llama-drama-av1-opus-480p.mkv" type='video/x-matroska'>
</video>
HTMLMediaElement.canPlayType('video/x-matroska')
→ MediaSource.isTypeSupported('video/x-matroska')
→