General Relativity Explained

I recently discovered this great video from Fusion featuring biographer Walter Issacson, in which he narrates a concise explanation of Albert Einstein's general theory of relativity in 3 minutes.  

One hundred years ago, Albert Einstein completed his general theory of relativity, which explains how the gravitational force works. This made Einstein an international celebrity during his time, and the theory is widely recognized as one of the greatest achievements in the history of science.
— Fusion