from the Comments section : " For those who are confused on the time frame of what this is representing, it's not necessarily "Vikings," and more or less not Neolithic. It's Proto-Germanic she's singing here, and in most of their music.
It's Pre-Migration Period, 600 years before the Vikings, ~1st Century CE til ~550 when Elder Futhark broke into Younger Futhark.
It's based on historical linguistic reconstruction and snippets of text found archeologically and through Tacitus & Saxo Grammaticus, some of which were carved in runes on bone fragments, or described pejoratively by Latin writers, who described the throat singing as like "howling dogs," when it would sound provisionally like in this video, inferred by the Sammi, Mongol, Indigenous Greenland, and Faroese traditions which survived the ages relatively unchanged.
Then they kinda do this English language "rap," which is based on descriptions of Galdralag and Seiðalag -- no surviving examples of which exist outside of very, very scant snippets in the Poetic and Prose Edda, and in descriptions by Saxo Grammaticus and possibly by Tacitus. The low growling and hissing, the forked fingers, is based on descriptions of Seiðr magic.
That kind of image survived in the inspiration of "witches" which Christians were afraid of deeply, who were real people practicing a similar indigenous artform, and came to become an abstracted meme of its own that evolved & mutated into the 21st century in a vague smear of pop culture idioms.?"
"Remember, that we all are brothers
All people, beasts, trees and stone and wind
We all descend from the one great being
That was always there
Before people lived and named it
Before the first seed sprouted"
HIELUNG (healing)
"Heilung is sounds from the northern european iron age and viking period.
We used everything from running water, human bones, reconstructed swords and shields up to ancient frame drums and bronze rings in the songs.
The lyrics contain original texts from rune stones and preserved spear shafts, amulets and other artifacts. Furthermore poems, which either deal with historical events or are translations/ interpretations of the originals.
Every attempt to link the music to modern political or religious points are pointless, since Heilung tries to connect the listener to the time before Christianity and its political offsprings raped and burned itself into the northern european mentality.
Heilung means healing in german and describes the core of the sound. It is supposed to leave the listener eased and relaxed after a sometimes turbulent musical journey."