Yup, it works, and with alpha channel no less!
Just go download a 3.0 release candidate here: http://nightlies.videolan.org/
Unzip it, and copy all the .dll files into the DX11\nodes\plugins\vlc folder, replacing the existing ones, then delete/rename the existing plugins folder and copy the new 3.0 vlc\plugins folder over.
Then enjoy HAP alpha goodness with FileStream (DX11.texture VLC). Note these VLC libs are nightlies, and while RCs, you probably want to thoroughly test before putting in production. (And I have used FileStream VLC 24/7 for months with no problems; frankly it has been way more reliable than the native FileStream DShow9.)
You can get some HAP alpha files to test here: http://vdmx.vidvox.net/blog/spirals-new-free-video-clip-pack