Embedding Video

I know that YouTube video appears with just a link since Discourse uses Onebox. I was wondering if the functionality works with Vimeo (I've tried and cant make it work). Looking at the Discourse forum, it seems this is either version specific or as easy as whitelisting Vimeo videos if its not already. Question is if its not whitelisted, why, since YouTube is listed as ok in Onebox, and what version of Discourse does The Hive operate on?

The source code for this page says “Discourse 1.4.6”.

Well, I was asking 2 1/2 years ago…so I dont even remember why I was asking