That is not true . Laver Bariu was great but Albania always had great clarinetist and he will have ..!!! Like Lulushi , Jashar nazifi, Hekuran Xhambali etj etj
The guy here i think is playing a G clarinet (has some saxophone like keys ) but most just play a regular Bb with normal reeds and barrels. It is mostly on breath, tounge and more importanlty jaw control i think. I am albanian and know the music yet i could not reproduce the sound. No books or sounds to teach it is just passed down from masters. It is all technique notjing special on the instrument itself. On weddings and most commercial music they will use pickups with delay and reverb and even thay sound is unique to the region.