I am referencing that in that video that was posted that they described that the universe itself was eternal, and that there was a "singularity", also called the Big Bang, where the universe heated. That being said, it is possible that life existed before the big bang according to that video. Now if I misunderstood it please correct me.
I agree that natural selection takes place. There is no denying that a bird with this style beak will survive better in place X due to the food supply. That actually aligns with Biblical principles.
Actually, most schools of thought believe there was no time before the Big Bang, that without space, there was no time. But, with gravity's ability to mess with time, there may have been extreme time dilation just prior to the Big Bang.
There are also hypotheses that our Big Bang was created when a previous multiverse collapsed on itself (kinda common among string theory stuff).