Hulshult's IDKFA remixes for Doom 2

Maybe I'm just a little out of the loop but I thought for the longest time he only did Doom 1 and he just had a couple Doom 2 tracks on youtube.
Trying the new Doom 1+2, I thought oh cool, looks like he might have done all of Doom 2 for this.

Looks like this was just uploaded today:

www.moddb.com/games/doom-ii/addons/idkfa-doom2

This might be an unauthorized release.