Oh I did not know that, that's awesome. Einar Selvik is the frontman of Wardruna, and that's the band among associated acts that comes closest to the sound of this song for sure, atmospheric nordic folk. If you're not yet familiar with Wardruna's music and only found out about them through the Vikings score and dig this tune, they're a great starting place for checking out more music in this vein with the same intensity.