Way to undermine any credit to your argument
by referring to the african Dogon Tribe, and the egyptains, two vibrant cultures with their own paradigms for learning and scientific structures, as barbarians, your flash fails. Your entire argument relies, every time, on the fact that these 'barbarians' couldn't have done it, however, you fail to provide any anthropological or historical reason for why this is so.
For example. The Geocentric (earth centered) universe, as posited by Aristotle in this Physics, and also by other brilliant non-barbarous people, was wrong, sure. However, it was observed. Emperical evidence was discussed, debated, and tested. Science took place then, and has been taking place since man started growing crops or using tools.
TL:DR The 'barbarian' claim is unsubstantiated, and it is the keystone of your argument.
PS normally I review based on animation, but, considering the lack of mouth animation and the sterile character design, I'm reviewing the argument, which is what the flash was mainly meant to convey.
That being said, your argument is clearly dogmatic. 4/10
PPS. I do believe in the existence of extraterrestrial life. You just constructed an invalid proof.
Cheers.