<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/7/7c/Caminandes_-_Gran_Dillama_-_Blender_Foundation%27s_new_Open_Movie.webm/Caminandes_-_Gran_Dillama_-_Blender_Foundation%27s_new_Open_Movie.webm.720p.vp9.webm">
</video>