@shinyidol I love WebM!
Not sure what's required to show a webm plugin, though? Natively supported by browsers?
They display natively, but only when called by a player or <video>. To get this working a simple plugin would let a user embed a .webm file and fill in the <video></video> for them. 4Chan capped theirs to being 15 seconds long and no sound.
<source src="url" 'video/webm;codecs="vp8, vorbis"'
It would be nice if imgur supported it, but that doesn't look like it will happen.
I'm seeing people make Chrome extensions that will just see the link and display, such as this https://chrome.google.com/webstore/detail/webm-for-neogaf/gcjkaaggachnbhepejjhfacpldjflffl