Polish "Oberek" music... someone help

[matsoljare]

So, i find this clip with no information on what the music is, and hope someone here can help. I figure it's of a genre called "Oberek", but i can find very little information about that online, and of course the video itself has no information. So maybe someone here knows exactly what this composition is, or at least can give me more information about its genre:

+ YouTube Video

[JCarter]

Here are some videos that trace the evolution of the Oberek, from 17th century Polish villages to 21st century Chicago dance halls, and beyond:

http://lowiczanka.wordpress.com/2010...s-oberek-time/

The Oberek is one of Poland's 5 National dances. Very few countries have even one national dance. For more info and videos:

http://lowiczanka.wordpress.com/2010...tional-dances/