A clip of the Russian folk string quartet Skaz performing Brahms’s Hungarian Dance.
When I was growing up®, there was an old guy “Uncle Kolya” playing balalaika on the street for some change near my house. He sounded a lot like this.
Update: This post was published long time ago, so I am adding a new amazing clip by Aleksei Arkhipovskiy called “Hurdy Gurdy“: