Polyphony and disappearing cultures

This composition by young Corse singers (more here) made me think of Pikardijska Tertsia, a group that used to be popular during my time in Ukraine.  Similarly disappearing culture and language.  It made me think of Lviv, our old yellow-red trams, meetings at Mitskevich monument, old bookshops, coffee houses, dark churches, and basement beer joints.  Looking for a video I was not able to find anything too decent - the best one is this one from a Polish TV, with young Tertsia singing their best song...Memories, I am almost ready to read up on Proust...