Besides, this pic, if genuine, is not of the shuttle. It appears to be a close up of the fuel tank and one of the shuttle mounts.
The NASA spokesman mentioned some photos that were taken on a previous shuttle mission where damage occurred to the tank insulation. He said the photos were taken of each trip and with a still 35mm camera and not a digital. So this is likely from a previous trip.
If it is from this trip, then it is as stated, a frame from a downloaded video. No mention has been made of the existance of this film for this trip.