It shows Jack (Raiden) watching a man get tortured in front of him and ultimately, get his throat slit with a knife. I’m guessing the knife is some sort of metaphor for Raiden’s samurai sword? That seems to be the running theme in these videos — that Raiden is getting brainwashed and all that to be the ultimate killing machine.
Hopefully, Konami releases actual gameplay footage and details soon, no?
Metal Gear Rising: Revengeance is scheduled to be out later this year for the PC, Xbox 360 and PS3.