<audio>
and <video>
tags without Javascript.video/webm
→ Test this MIME type <video preload="auto" controls="controls" autoplay="autoplay">
<source src="https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c0/Big_Buck_Bunny_4K.webm/Big_Buck_Bunny_4K.webm.480p.webm">
</video>