The video proports to be a pentagon briefing from 2005 about a proposal to spread a virus in the Middle East that would prevent people from developing extreme religious views. Besides the obviously ludicrous nature of this idea, the video itself is fake, a deliberate hoax. The audio does not match the motions of the speaker very well, but the most telling thing is that the graphic that supposed shows "two different individuals" is actually two images of the same brain.
More telling, it's actually the brain of a 43 year old meth addict, taken from this article in the Dec 2010 issue of Neurology.
So, a video uploaded in 2011 is supposedly a secret Pentagon video from 2005. But actually used photoshopped images from an unrelated 2010 article. Since the image did not exist until 2010, this proves the video is a fake.