Too many other factors play a role in the experiment explained in that video to justify the "born that way" argument...it is what it is...
That basic twin study design is the foundation of the entire field of behavioral genetics. Thousands of peer-reviewed articles have been published in the most esteemed scientific journals using that exact experimental method but it's not good enough for you?
Like I said...the arguments and the leaps to the conclusions reek of biased presuppositions that are used to reach a conclusion that benefits their desired outcome