<audio>
and <video>
tags without Javascript.video/webm; codecs="av01.0.04M.08,opus"
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://woolyss.com/f/av1-opus-sita.webm" type='video/webm; codecs="av01.0.04M.08,opus"'>
</video>
HTMLMediaElement.canPlayType('video/webm; codecs="av01.0.04M.08,opus"')
→ MediaSource.isTypeSupported('video/webm; codecs="av01.0.04M.08,opus"')
→