But like many people I know, I had it around my house forever.
So here's the same material, presented in a 2'20" video:
Note that the big bang creates time and space itself rather than merely exploding a dense ball of matter matter within time and space. Note also that space itself expands after the big bang. Things get further apart not just because they are moving, but also because space is growing, a bit like a baloon expanding in order to help push the dots on it further apart. Is that right?