Does Blender provide a web-compatible codec-container combination that allows for transparent backgrounds in videos? I want to output a video file from my blender animation that (1) has a transparent background, and (2) is supported by the major browsers via a &lt;video&gt; element. Ideally, it also won't be a massive file. 

Does Blender support such a codec-container combination?
I've found that container=WebM and codec=WEBM/VP9 seems to do the trick (though Safari doesn't support VP9 at this moment in time).