Cant say i'm impressed with having a camera phone shoved in your face and be expected to "perform" on demand. If he wanted to interview them he could have filmed himself asking if it was ok to film them and respected their wishes, he could then have dropped it down to voice recording option again with their consent if they had said no to video.
No they didnt do very well did they, but not many 18 - 25 year olds could in their shoes, I'd have done a better job at their age, but the camera isnt going to help with recall or thinking on your feet unless you are used to having your life filmed on a regular basis.