The obvious answer is that they didn't have DVDs back in Moshe Rabeinu's time. But still, Hashem could have created them back then. My question, "Why wasn't the Torah given as a DVD?", is really ...
According to the beginning of the Mesilas Yesharim, the entire purpose of creation is for man to merit Olam Haba (the bliss of the next world). If so, why is there no mention nor description of Olam ...