Finnish guitarist Mari Mäntylä plays Finnish Rhapsody by Russian composer Nikita Koshkin (b.1956) on a 10-string guitar (decacorde). This comes via her great YouTube channel. I can’t find anything about this piece but I’m going to guess it was written for Mäntylä (I’ll try to find out). She is awesome with this 10-string, impressive and musical playing, just think of the repertoire she could pull off (Weiss etc).
Out of interest, here is some of her Bach from Lute Suite in E minor, BWV 996, Prelude – Presto.