I love it when music videos try to build awareness towards social issues. 
Though the rock band Nickleback hasn't gotten the best publicity lately, they've definitely helped advocate for awareness through one of their older videos titled "If Everyone Cared". 

     

They highlight how people single handedly attempted to tackle poverty, famine, and politically motivated violence. Many of those who attempted to do so made a huge difference in the world. 

                                 

Check out the music video by clicking here. 
If you know of any other music videos that portary the strength of solidarity and how people have been able to make change happen one small effort at a time. Hopefully this inspires you all to try volunteering more often, I know it helped me want to go volunteer more. 

-A