The piece is named "Heidrun". It was written by the widely unknown german guitarist Tommy Westrich who found an early death back in the 90ies (?). I don't know what happened to him but I think it is really sad. He wrote beautiful music.
German acoustic guitar mag "Akustik-Gitarre" had featured this piece some 15 years ago. I have played it ever since even though I find it rather hard to play (as you can tell by the edit at 2:14 ;-)
Does anyone have the original recording?
Guitar: Collings OM-2H
Camera: iPhone 4S
Mic: Zoom H2n
Put together in iMovie HD