Here’s a group guaranteed to get your toes tappin’ and your fingers slappin’. It’s a Belorussian medieval folk group, Stary Olsa. They’ve been around for 20 years, and have established quite the following in Europe.
Here’s a studio recording of one of their songs, “Vitaut” (which Google Translate doesn’t recognize, so I can’t tell you what it means, but the video theme suggests it’s a martial number).
Where the group shines is in live performances, where they string together several songs or instrumental numbers into a medley. Here are two such lengthy pieces.