<audio>
and <video>
tags without Javascript.video/mp4;%20codecs=%22avc1.4d001f,mp4a.40.2%22
<video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://www.mainconcept.com/fileadmin/user_upload/products/Source_out.mp4" type='video/mp4;%20codecs=%22avc1.4d001f,mp4a.40.2%22'>
</video>
HTMLMediaElement.canPlayType('video/mp4;%20codecs=%22avc1.4d001f,mp4a.40.2%22')
→ MediaSource.isTypeSupported('video/mp4;%20codecs=%22avc1.4d001f,mp4a.40.2%22')
→