After the video was deemed by the staff to be more than likely an "acceptable approximation" (there are little certainties in this line of work), the majority of our time was spent broadening the database, looking through potential test subjects for future tests, figuring out why our subject had woken up during the run, and analyzing the video. By September of 2006, the various theories had gathered their own groups of followers on staff, and analysts (me being one of them) had a hard time cooperating with colleagues who subscribed to different ideas regarding the video.
I was a believer in the theory that the mind had detected our presence and blocked us as a defense mechanism. The human body is designed to protect itself - a common fact - but the thing is that people generally apply this line of thinking only to physical aspects of the human body. The truth is that our minds are just as well prepared to defend us as our immune systems. Since the subject was aware of the experiment, the mind recognized itself as being vulnerable long before we actually started looking around in it. It knew we had technology potentially capable of viewing his fears, weaknesses, etc.
In fact, I believe it decrypted itself for us. Perhaps most of the time it would appear as abstract imagery, but it knew we wouldn't understand this. It knew, to show us we were unwanted, that it would have to display itself in a form easily understandable to humans.