"There is a minimum requirement for flight which
 it met. That involves maintaining altitude and
 speed over a certain period of time, whereas in
 a glide you either lose speed to maintain altitude
 until stall or lose altitude to maintain speed until ground.
 The flyer maintained and even appeared to gain 
 altitude after the pull cord was released from the car
 and maintained speed throughout the flight. If you are
 wondering how I get this from the video, it's because
 I am familiar with the researchers who did this."