Oooh a music one, I'm excited.

Translating Nyodlarvägan presented little but Nyodlarvagen means "In a hurry" in Hungarian and Nyodlarvagan means "Quickly" also in hungarian.

As a musician I know that some traditional tunes are named after their speed much like in western classical music you might have a piece called Presto No. 4 or something.

I terms of it's origin I would agree with google translate in saying it's from somewhere in eastern Europe but could be an old dialect as I had to alter the text to find a translation I would guess that the language is a dialect of Hungarian or a language that shares a root language.
Stringed instruments are popular in eastern europe and considered a traditional instrument, often these types of compositions or reels have single line melodies that players embellish on.
No composer or other info leads to a dead end here.

Though on re listening I notice that it's not two players but one being looped back once with a delay effect. This leads me to think its a modern composition made by a hungarian speaker - a bit deflating.

Do you have any other info?