a.k.a., the gits you can blame
8.4: Stable Media module lands!!! =D
...with no UI
8.5: Media module declared safe for public consumption!!!
...but it has a sad-bastard UI that makes kittens weep
8.6: Experimental media library lands!!!
...with a gorgeous UI!
Also 8.6: oEmbed support lands!!!
...and it fucking works with YouTube out of the box!