You only watched a few minutes of the end of the film. I would greatly recommend watching the entire movie. I found a clip of Ben Stein on the Glenn Beck show talking about Dawkin's response. In it he reiterates that Dawkins concedes that there MUST have been intelligent design to account for the complexity such as DNA. It is amazing that he is willing to accept that an alien species (an advanced civilization somewhere in the universe) could have seeded the earth with the beginnings of life yet refuses to allow that seeder of life could be "God". He also failed to explain where "they" came from. Watch it here
We have difficulty, it seems, accepting the world as it appears (to us) without adding to it our own "explanation" as to why it is the way it is. The world looks, smells and sounds a lot different to different species then it does to us, and their reality is quite different from ours.
We just have difficulty saying "As of this moment, we don't know." We succumb to our fancy and create answers. Dawkins obviously succumbed to his, at least for a moment.