One could not judge the height of recovery based on the video supplied.
Furthermore, none of the rolls that guy did were even close to the Barrel rolls discussed earlier in this thread. All he did was point the nose up and flop the stick over. This is an aileron roll, during which the vertical component of lift degrades to zero or negative. This is evidenced by the profound pitch and altitude changes during the rolls in this (admittedly really neat) display.