Except that it ISNT self-evident. There are plenty of mammals with no apparent bias as to which sex is more prone to violence, more if you exclude the minority of mammals where only one sex has a natural weapon.
You might have a slightly better case if we were just talking primates. But not by a lot.
Is there a particilar part of a lecture about chimpanzee mating habits that you think especially buttress sexism? If not, just referring to a whole video as a reference is just a gish galllp through citation.