Ryan Brunet & Les Malfecteurs were recorded from Rendez-Vous des Cajuns, a weekly live variety show broadcast over cable tv in Lafayette, LA.  They’re doing a medley of Creole Stomp with J’ai Ete Aul Bal.  That’s Christine Balfa on guitar and Joel Savoy on violin (the one with a beard and no cap).  It’s a National Park Service site, so that’s why a park ranger introduces them.