<audio>
and <video>
tags without Javascript.video/mp4; codecs="hvc1.1.6.L150.80"
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://s3.amazonaws.com/x265.org/video/Tractor_500kbps_x265.mp4" type='video/mp4; codecs="hvc1.1.6.L150.80"'>
</video>
HTMLMediaElement.canPlayType('video/mp4; codecs="hvc1.1.6.L150.80"')
→ MediaSource.isTypeSupported('video/mp4; codecs="hvc1.1.6.L150.80"')
→