It is, an it sounds like the version of Fanfare Ciocarlia, a Romanian brass band. https://www.youtube.com/watch?v=0-7W4-DLFEA
I couldn't imagine an American skating to Balkan music and personally, it looks like the person who made the video just chose a favourite piece of music as a background. But if that's his music, it would be really cool! Balkan music is very energetic and full of soul, he could definitely benefit from it and be a bit more playful with the audience!
I’m very intrigued that this tune would be thought of as “Balkan” because the band playing it is from the Balkans.
Caravan is a Duke Ellington composition, the essence of jazz, and of course jazz is the quintessential American art form. Even when interpreted by a Roma band.
Either way, if it really is Nathan’s music, I applaud it