This is a beautiful classical piece called Czardas (also known as Csárdás) by Vittorio Monti. Even if you don’t care for (or think you care for) classical music you have to give this a listen.
The bass player kills it. It’s intense. If you don’t know a lot about string instruments, bass in particular, you must know that the notes the bass player is hitting are really tough to play. The guy is an incredible player.
Pay attention to the expressions of both players if you want a laugh, but definitely try to listen to the intricacies of the whole piece. Unless you’re a bass player or quite good at listening multiple parts in a piece, you don’t often hear the bass parts (or realize you hear them).
This is one of my favorite pieces! I hope you enjoy it too 🙂