its called 'Intonation Rhapsody' but he also covers an old Charlie Chaplin song which I can't remember the name of. I've spent the last few weeks figuring out Intonation Rhapsody (as there's no sheet music, tabs etc. online) i'll be posting it this week! (although i'm playing it on a soprano - so the ending is fractionally different)
www.youtube.com/ukeshale