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 about why the Torah was given in a written and oral format, instead of a visual and audio format. One would think that because we live in a visual and audio world, the Torah should have been given in a visual and audio format, like a DVD, with actual video footage of the events described.