Can't watch the videos, computer chokes. I'm guessing it talks about the effects of child abuse and adult behavior?
Don't know if this is topical or not but there's an episode of Through the Wormhole entitled "can we eliminate evil" you might find interesting. Essentially, sociopaths can be both born and made. There are measurable differences between the brains of violent criminals (primarily in the amygdala) and "normal" people. What's interesting is that if a person with the abnormality in their brain has a "normal" childhood they don't necessarily grow up to be sociopaths.
When I raised animals there was a simple rule of thumb, you don't breed an ill tempered animal, period. You stood a good chance of getting ill tempered offspring. I witnessed this directly with hamsters, of all things. My ex and I had Russian Dwarf Hamsters of a (then) highly unusual color, making them desirable. The female was a good mother, but a total bitch. The male was sweet. Because of the unusual color we let them have pups. EVERY litter they had resulted in 50% of the offspring being biters.
Humans, having more evolved brains, can be born with the native tendency to "bite" but since we do have frontal lobes we can be "taught" what constitutes appropriate behavior

We have the ability to control our impulses if we are given the right tools from a young age.
Nature/nurture is undoubtedly what contributes to child abuse and criminal behavior in general being a family trait. It also explains why perfectly normal families end up with kids who go completely off the rails. Maybe somebody's great-great-grandpa was a rapist and murderer and that latent gene popped up.