Beautiful rendition of Johnny Cash's song "Hurt" by the 2Cellos. So powerful and emotional. Love Johnny Cash anyway, and this song, but it goes so well on these divine instruments.
The 2Cellos are great musicians too. They've done a lot of beautiful songs (like Shape of My Heart, With Or Without You, Hallelujah, and more), I highly recommend looking them up if you don't already know of them.
Be prepared for feels if you listen.