Schatzie, Neena and Serena,
Your video was fun to watch and raises very interesting questions. No one really knows what happens at the very high density (around 10^93 kilograms per cubic meter) that characterized the Big Bang, so it is far from certain that the fact that the Big Bang was very uniform rules out the possibility that it was preceded by the contraction of a very non-uniform previous universe. In many cyclic cosmological theories, the Big Bang is preceded by such a "Big Crunch", and, in some sense, we could say that the Big Crunch is the formation of a black hole, and the Big Bang is a reverse black hole, or white hole (that was the conclusion of Isaac's Asimov book about black holes, if I remember correctly). Now, if you add inflation to smooth out any initial irregularities of the Big Bang, it is even less a problem to have our universe descended from a very non-uniform Big Crunch!
Good luck in the contest!
Marc
P.S. If you have a chance to view, comment and vote on my trilogy of videos entitled "This Is Physics" --- where I try to convey the "fun of physics" by focusing on some of the greatest moments of its history --- it would be quite appreciated. Only one week left to vote! (Don't forget just before voting to enter the author code FQXi sent you, so your vote properly registers in the community category.)