Unknown Track from The Elder Scrolls IV: Oblivion

So I was reorganizing my Jeremy Soule OSTs, where I stumbled across this beautiful piece of music.
It was inside the Elder Scrolls IV: Oblivion folder, so I think I recorded this from a video or something. I don’t really know where I got this from, but it’s a few years on my harddisk now, waiting to be discovered. It should have been recorded by the time when Oblivion was announced or maybe it was a track you could download on their site just before release of the game. Maybe you can help me find the name of this track ? I just called it bonus track. Anyways, enjoy listening ! 🙂

https://www.youtube.com/watch?v=zXA24iQrjGY