1. Despite what Slick here says, atheism is not a worldview, philosophy, or religion. It is simply a position on the existence of deities.
2. Neither atheism, nor atheists are required to account for the creation of the universe.
3. Slick here says that "whatever has come into existence was caused to come into existence." Most theistic religions, including Christianity violate this assumption by saying that God, by definition, exists, but was not caused into existence, or brought itself into existence. If we are allowed to assume this initial assumption to be false, or breakable allow me to suggest any one of the following as an accounting for the existence of the universe:
a. The universe, by definition, exists but was not caused into existence, or was brought into existence by itself, or a past universe.
b. At some point in the past, I created the universe, which then went on to create me.
c. A fibbidyjibber created the universe. The definition of a fibbidyjibber is an unintelligent, non-divine entity that exists (but was not caused into existence, or caused itself into existence) for the sole purpose of creating universes.
4. Even I understand the second law of thermodynamics better than this guy.