I saw the moral argument bit of the video, in my opinion evil doesn't exist, evil or wrongness is an abstract concept which in my opinion don't exist or atleast haven't been proven to. Most societies don't kill or rape because of the consequences such as ostracisation, retaliation and recently legal consequences.I think morals are
1. a control system to keep the masses in check
2. a way for humans to express preferences (e.g. if someone steals from me, I could say "Stealing is wrong", but what I'm really trying to say is "I don't like stealing" or "Don't steal from me".
Morals are mostly taught or serve some biological survival purpose