No way either of the videos are real.
Look how he's holding the phone; always in the middle, as though he doesn't want it to fall apart.
Ans even so, the phone seemingly on purpose goes out of the camera shot, just before he bends it like butter.
I'm not saying it can't be done, but no way was it done in either of those videos.
http://youtu.be/h-DcUASffHU?list=PLlPg4PRAUWoeqnKCHMnWN4XdQXwWcLMrg
This is a respectable german computer magazine.