The video may seem to start off a bit slowly, but you should watch it all. The introduction is very relevant. He song touched me deep inside.
It is based upon the murder of Emmett Till, over 60 years ago. The saddest part of all is that such attitudes are still abundant, especially in the Deep South of the USA.
You can read much more about this song and its background in this excellent article by Eric R. Danton in the Speakeasy section of The Wall Street Journal.