@xen is it yours?

Automaticly forced convert gif to webm(or mp4) using ffmpeg
Output it like <video> looped and without video controls.
Like imgur's .gifv

@drew what about file upload?

@julian its suggestion ^_^''

Suggestion:
Unwatch selected topics in unread(https://community.nodebb.org/unread)
Ex. http://i.imgur.com/essYqgz.png

@pichalite how to change group cover in your theme?
http://i.imgur.com/yu2LUVS.png