The short graphic simulation was probably done by the TV company and they needed to err on the safe side, despite the video evidence. I doubt the carrier could have been together enough to try and get that together so fast.
As I have said before, every carrier's CEO and every Captain MUST assume that at least one video recorder is running at ALL times. It is the pax video that will carry public opinion and will be used alongside the data recorders to apportion blame. Pax will continue to ignore instructions not to use video/camcorders/phones, it is a simple fact of life.
If the carrier had any sense - the moment they saw that video - they would have started negotiating as it's Game Over. They won't.