Accoding to Wikipedia he plays the guitar, bass, drums, banjo, piano/keyboards, ukulele, organ, violin, clarinet, saxophone, and recorder. They mention the gong as well, but I'm not sure how you play a gong other than striking it (not much talent needed there). The site also says he's released 38 solo albums and performed on 50 more. Taht's real impressive.
I've never heard of him, but then I'm a classic rock kind of guy. I liked the music in the video you posted. I wonder what he looks like without the mask. He reminds me of Jason with a guitar.