Thanks for responding guys
What struck me about the number was the very deep tone of her accordion and how much she was able to get out of it entertainment wise !
I don't speak the language, but I got the impression its meant to be something like "dueling accordions "?
The melodeon (sometimes called the "button accordion") is a very nice instrument. It can only play in two keys (D/G, G/C and B/C are the most common), and has a limited range, but the basses give you good possibilities for simple accompaniments. VERY popular for folk music. They're very small, lightweight (typically only 2-3 kg), and inexpensive for a basic plain wooden one.