Thanks for that. The singing style is quite like the way I could imagine my Bosnian pal here doing it - I'll ask.

Sevdalinka isn't really a folk genre. It's Ottoman art music turned into pub and theatre entertainment. Classical technique and feeling is just fine for it. Look up the singer Amira for another example, or people like Himzo Polovina back in its golden age (psychiatrist in his day job, pro singer by night).