Unsurpisingly, I heard this for the first time via Playing for Change. I've linked to their videos before, and will continue to do so in the future, but this I had never heard until I played their CD. I often listen to Playing for Change just for the joy the sound of their videos gives me. This particular video speaks to me, though. I often relate to the idea of Love the way other people relate to the idea of God, although I don't think "love" exists by itself in a form of Platonic idealism.
The choir singing is the Omagh Community Youth Choir of Ireland. You can see them singing -- and hear an account of how they came to be -- here. The lyrics they used are slightly different from the original lyrics.