Very nice instrument and video -- beautiful piece you played!
As for the video, when I clicked on the embedded video in your post, I got an error message, but when I clicked on the blue hyperlink below it, I was taken to youtube where the video worked, so the link itself is okay.
Beautiful instrument! I have been looking at multi string guitars lately and your Theorbo sounds and looks great. The bass notes are clear and I love how resonant they are. I couldn't open the link in the large picture but the the link below it to youtube opened for me.
2004 Luis Sevillano Flamenco
1979 Ramirez 1a 10 String
1992 Paulino Berbabe M50
1968 Taurus model 56
2005 Dan Lankford 8 Course Renaissance Lute
2008 000 Bertoncini
2005 Breedlove C25 Northwest Classic
old German Lute Guitar