Authorities said Rodger allegedly began his crime rampage by fatally stabbing three roommates at his apartment complex.
In the printed document, Rodger described his anger and alienation.
In the last video, posted Friday night and titled "Elliot Rodger's retribution," Rodger described his anger toward women and men.
"I'm 22 years old and still a virgin, never even kissed a girl. And through college, 2 1/2 years, more than that actually, I'm still a virgin. It has been very torturous," he said. "The popular kids, you never accepted me and now you will all pay for it. Girls, all I ever wanted was to love you, be loved by you. I wanted a girlfriend. I wanted sex, love, affection, adoration."
""You forced me to suffer all my life, now I will make you all suffer," he said. "All you girls who rejected me, looked down upon me, you know, treated me like scum while you gave yourselves to other men. And all of you men for living a better life than me, all of you sexually active men. I hate you. I hate all of you. I can't wait to give you exactly what you deserve, annihilation."
Brown described the drive-by attacks as "the work of a mad man."