Ukrainian folk song (or the Ukrainian version of a common-enough Eastern European folk melody) as performed by the Ukrainian Village Band http://www.ukrainianvillageband.com. 

This was unrehearsed. The bajan player just broke into the tune at the gig and the band followed. The tsymbaly and kontra players thought it would be fun to switch instruments. trying their hands at something new. You can't really hear them anyway. 

We played it because there is a Latvian folk song with a very similar melody and one of our band member's wife and half of each of his kids are Latvian.  His daughter bolted to the dance floor to do the Latvian folk dance to the melody, except there was a problem: There's a repeat in the Ukrainian version that there isn't in the Latvian one. 

C'est la vie

Dykun