From Vat19 videos, fast, starts with a triangle, first note is D, has a flute

I am not the person who is actually looking for this song. The person who is looking for this song needs this music for a video. Shazam was unable to identify this song. It is likely not Kevin MacLeod.

The melody goes: D C D C E A A B B E D

Another person has recorded themself singing the melody: https://voca.ro/1iNfRQ6KfkZJ

Any help?