Looking for info on the Bulgarian Koledari

I am a Croatian born in the Dubrovačko-neretvanska county, one of the rare if not only places kolendavanje as we call it is still a practice within Croatia. Recently, I grew more interested in this tradition, as kolendavanje in Dubrovnik is always accompanied with the Kolenda song. It has some variations, but here is [a video of the most common variant](https://youtu.be/deL7nG_hypw), I can provide a translation if necessary.

Since Koledanje is a tradition present at least in part in a considerable amount of slavic nations, I wondered how it manifests differently within other countries. Obviously, there are the basic cultural articles I could find, but I would like to know more about the Bulgarian koleda, mainly it’s most common melodies, dances and lyrics, if you can provide, videos, etc.

Thank you in advance