This is an ancient Finnish tune. During the times of The Inquisition of several hundred years ago the Finnish witch was the most sought after, persecuted, Finland having a long tradition of magic. My username here is Finnish, tuulen meaning of the wind.
The group performing the tune is Linnut, meaning Birds. Please do not ask me to explain the Finnish language but the tune is known as "Kylä vuotti uutta kuuta" which roughly translates as "To a village in turn came of a new moon" and the main character here is Miero which translates as meaning Beggar, the impoverished.
But the name of the tune is a lie and the video shown is a lie. The video shows a bright full moon, not a dark new moon, and shows a summertime lake. Oh, how lovely! But rather, picture extremely cold temperatures with that lake frozen to a depth of one meter of ice and, as Miero, your only food has been the bark shaven from trees. Thusly, you learn how to pray.
Tuulen Akka, tuulen Ukko, I pray to the wind of the mother and to the wind of the father. Blessed be.
And then; https://www.youtube.com/watch?v=cPMjFJfnhJA