Here's one of the submissions to Discovery Magazine's "Evolution in Two Minutes" contest. It's the one chosen by viewers [The Winner: Evolution in Two Minutes].
I wish we could stop talking about "The" theory of evolution. There's really no such thing and the term conjurs up thoughts of evolution being only a theory. A better term is evolutionary theory.1 A short description of modern evolutionary theory would include population genetics, the major mechanisms of evolution (natural selection and random genetic drift), and the latest theories of speciation. More sophisticated versions of evolutionary theory might include punctuated equilibria, lateral gene transfer, symbiosis, neutral theory, group selection, kin selection, species sorting and molecular phylogeny.
But before you can talk about any of these things you have to define evolution so that we all know what we're talking about. The consensus scientific definition of evolution—the fact, not the theory—is: "Evolution is a process that results in heritable changes in a population spread over many generations" or some related variation of that statement [What Is Evolution?].
The makers of these videos are free to select a definition that is not the consensus scientific definition but why would they do that? Is it a good idea to use another definition to teach the general public about evolution? What purpose does that serve?
It's OK to talk about The theory of natural selection or The theory of punctuated equilbria.
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