<audio>
and <video>
tags without Javascript.audio/ogg;%20codecs=%22opus%22
<audio preload="auto" controls="controls" autoplay="autoplay">
<source src="https://s3.euer.tv/audio.opus" type='audio/ogg;%20codecs=%22opus%22'>
</audio>
HTMLMediaElement.canPlayType('audio/ogg;%20codecs=%22opus%22')
→ MediaSource.isTypeSupported('audio/ogg;%20codecs=%22opus%22')
→