I also found this video by Sarah McLachlan for her song "World on Fire" in which she shows how the money that would have gone to making the video went to various service projects throughout the world. I just think it's really nice that so many could be helped by those projects.
Finally, I also like this protest song by Sting called "They Dance Alone." It's about a group of women who protested the disappearance of their children by the Chilean government by dancing the Cueca (Chile's national dance) while holding photos of their disappeared loved ones. I liked how Sting recognized the women on stage and danced with each one of them. It shows how even doing things like dancing to protest injustice can have an impact. At the very least the voices of these women were heard and people remember them for this. I'm just glad there's a song to commemorate how brave they are.