Once is a 2007 award-winning Irish romantic musical drama film. It is a truly beautiful story. I watched it on HBO Max.
Roger Ebert says, "It's one of those films where you hold your breath, hoping it knows how good it is, and doesn't take a wrong turn. It doesn't." Empire Online has a positive review. Rotten Tomatoes has a critics consensus score of 97%.
Here's one of the songs:
You can listen to the soundtrack on Spotify:
or on Youtube.