I guess we all are well familiar with this Czech, original polka 'Skoda Lasky', also called 'Beer Barell Polka', or 'Rosamunde'. Joef and his wife Renata are in this video clip demonstrating how it should be performed. By the way, Renata can play skillfully button accordion like nobody else can !
Renatka and Josifek performing Czech song 'Cervena Ruzicko' (red rose).