Video Timing
I'm not smart enough to figure out whether the video is real or not.
However, the question of the timing and placement to get the video may not be as complicated as one might think.
How does anyone know that one of the passengers may have been a suicide bomber. He/She may have been instructed to push "the button" at a precise time.
I am assuming that this flight route may have a fairly regular track, so once takeoff time was known, it would have been fairly easy to have videographers, maybe multiple, in the right locations.
Just my $.02....