This is a song, or perhaps a clip of various songs, in the language of the Croat community living in Kosovo, also known in Serbo-Croatian/BCS as
Janjevci. They apparently speak the Prizren-South Morava variety of BCS. I'm not sure whether the song(s) in this clip was/were actually performed in Kosovo, Croatia, or somewhere else (I got the impression it was performed in Croatia for some reason I no longer remember):
https://www.youtube.com/watch?v=CseHt_mGZXY