on second thought, maybe after the "Attention Crew at Stations" message, the FA was concerned with having to evacuate (BA at LAS comes to mind) and wanted pax to stop recording to focus on the instructions to come. Plausible?
I'd be inclined to believe that and give them the benefit of the doubt. When you abort a takeoff that way the flight attendants will clearly be thinking "Is this an evacuation situation?" and be ready to take charge and issue orders. This could easily have been a copy of the BA incident at Vegas a couple of months ago for all she knew that that moment.
PR is the last thing on her mind.
As for this incident and whether "computer said no" the last plane I flew the fuel gauge consisted of a clear tube on the side of the tank so this sort of tech is way beyond me. I'll be interested in hearing exactly what happened.