Watch the entire report, not just that 3 minute clip. The scenario they set up loosely duplicated an actual. They repeated this scenario several times, with several different students, and clearly demonstrated how in ALL cases, the simulations had a better outcome than the original attack.
In all of the scenarios they aired, the defender was severely wounded, sometimes without having fired a shot. But that's not the whole story. The whole story is that in the actual attack, a lot of people were killed and/or severely injured. 10, IIRC. In all of the scenarios presented, the only good guys "killed" were the instructor and the armed defender. The defenders weren't the only people tunnel visioned on their targets; the attackers were as well, and chose to shoot at the defender instead of the unarmed, fleeing "students"
This was all despite the lack of training the defenders had with their weapon and method of carry. In the first scenario, they loaded, holstered, and concealed the weapon for the student - he never had a chance to practice a draw under ideal conditions, let alone from concealment under a t-shirt that was three sizes too big while wearing gloves that were two sizes too big, and wearing a motorcycle helmet.
The original report criticized concealed carry as ineffective, even more dangers, and yet even under the most biased conditions they could throw out there, they showed exactly the opposite.
To get the real lesson from those videos, turn the speakers off and use it to motivate you to train.
My 2 cents on campus carry is that if there isn't a visible, armed, uniformed presence within earshot of every point on campus, any university that does not tolerate armed faculty or students is culpable for any injuries sustained during any sort of violent crime on campus. Frankly, I think it's cheaper and safer for everyone involved if students are allowed to carry responsibly. By all means, prohibit them from drinking while armed, require firearms to be holstered on their person or secured in a vault at all times, take reasonable precautions, but let people carry. You don't know where they live, you don't know what threat each student faces in their personal lives. If they feel the need to go about armed, let them arm themselves!