I love how he managed to actually made a proper sounding irregular rhythm Bulgarian folk song ... That's when I was like ohh 👀 because I genuinely haven't seen many cases of people outside of Bulgaria and north Macedonia that pull of the irregular rhythm, everyone does the melody and the vocals but the rhythm is a very specific thing

For reference look at the witchers version of "lazare" and the Bulgarian folk song(which it was based on) of "oj lazare" notice the rhythm