This is the theme song of the film *Veronica Guerin*, starring Cate Blanchett. This song plays during the funeral of the protagonist, and segues to the CBB of the film, if I'm not mistaken.
Never mind the video though, the uploader used clips from *The Lord Of The Rings: The Return Of The King.*
Thanks to Neboola for uploading this video on YouTube. The source after the jump.
Amazon page on the film after the jump.
Amazon page on the soundtrack after the jump.