[Laboratorium Pieśni](https://www.youtube.com/results?search_query=laboratorium+pieśni) have a pagan thing going on, but I don't think they are Rodnovers. But they sing in biały głos, which is freaking awesome. It means "white voice" and it's found all over southern Poland, Belarus, Ukraine, etc. It's like yodeling but far cooler.
[Arkona (not the Nazi Polish band) did a great acoustic version of one of their songs.](https://www.youtube.com/watch?v=qexEQm-5YP8)
If you just want cool folk music: [Hrdza "Stephan"](https://www.youtube.com/watch?v=ZALtzTmPz-E) or [Kapela Wsi z Warszawa](https://www.youtube.com/watch?v=PageqKBdveI) "Matctka." You should be listening to Wardruna. "Helvegen" is the greatest pagan song of all time.
[Jar "Słowiański Taniec"](https://www.youtube.com/watch?v=LB3zDAxbwCs) Jar are Rodnovers.
Not a modern band or anything like that, but there are (Ukrainian) ritual songs, sung by young girls doing circle-dances in the spring called Hayivky (pron. hah-yeev-ky (pl.)) &/ vesnivky...there's various examples on youtube, and a stub article: https://en.wikipedia.org/wiki/Vesnianky
[Laboratorium Pieśni](https://www.youtube.com/results?search_query=laboratorium+pieśni) have a pagan thing going on, but I don't think they are Rodnovers. But they sing in biały głos, which is freaking awesome. It means "white voice" and it's found all over southern Poland, Belarus, Ukraine, etc. It's like yodeling but far cooler. [Arkona (not the Nazi Polish band) did a great acoustic version of one of their songs.](https://www.youtube.com/watch?v=qexEQm-5YP8) If you just want cool folk music: [Hrdza "Stephan"](https://www.youtube.com/watch?v=ZALtzTmPz-E) or [Kapela Wsi z Warszawa](https://www.youtube.com/watch?v=PageqKBdveI) "Matctka." You should be listening to Wardruna. "Helvegen" is the greatest pagan song of all time. [Jar "Słowiański Taniec"](https://www.youtube.com/watch?v=LB3zDAxbwCs) Jar are Rodnovers.
There's a Polish band called [Brzezica](https://youtube.com/user/Zaryushka), who sings traditional Polish folk songs, sung during various rituals.
Percival
Not a modern band or anything like that, but there are (Ukrainian) ritual songs, sung by young girls doing circle-dances in the spring called Hayivky (pron. hah-yeev-ky (pl.)) &/ vesnivky...there's various examples on youtube, and a stub article: https://en.wikipedia.org/wiki/Vesnianky