One thing the video didn't address was the capture process. I keep wondering how this whole fly-up-and-bag-it thing would work. I find it unlikely that the rock just be sitting there waiting. It would have some rotation. If we've learned anything from recent close encounters with asteroids, it's that they are rotating on multiple axises. Even a small rock like the one in the video would have a lot of inertia to overcome in order to bring it to a stop. I doubt that little docking clamp they showed would have enough fuel to do the job.