Where does mass come from?

One of the many very good youtube channels on physics had a recent episode that tackles one of my favorite subjects:  most of our mass comes from energy:

https://www.youtube.com/watch?v=Ztc6QPNUqls

The bonus in that episode is that the strong force is better explained there than anywhere else I've seen.

For reference, my old post that links to my prezi on energy which is simpler but makes the same ultimate point:

http://riddicisms.blogspot.com/2011/03/prezi-on-energy.html