I've actually spent 10 hours searching for this really great but now also very infuriating song for my friend and I would be more than greatefull for your help! We saw the music video quite a while ago, but I'll try to be as thorough as possible.
A child finds a toy or a model ship in an attic and looks inside, where there's a woman with black hair singing and playing on the guitar. Also the chorus contains a tripple repeat of a word we just cannot remember. I hope it's enough to go on :/