A while ago we mentioned the general assembly of the German usus antiquior society, Pro Missa Tridentina, held in Regensburg.
Now a video has become available of the Solemn Mass sung on that occasion by Fr. Axel Maußen, District Superior of FSSP in Germany, in the Old Chapel of Regensburg.
The organ you can hear in the video is the "Pope Benedict Organ", built in 2006 and blessed by Pope Benedict on his visit to Regensburg that year:
You can watch a short video of the blessing (in German) here.