Half of the videos blocked for the Germans by the GEMA.

I still think it's great what you are doing here, keep it up!

Unfortunately, I missed my turn (I'm German), but here's something in case you want to do something for Austria:
Der Lindenbaum and Der Leiermann by Franz Schubert
You'll probably find tons of music for Austria, especially classical music, but those are two I really like.

Here is something from a Danish band I love:
Danish way to rock by Nephew
But I can't remember folk songs now.

Nice greetings~

P.S. The picture of Finny there is soooo cute!