100% wrong. After the keynote, employees were explicitly allowed to use the phone in public (I have seen several in person, one up close). They are told clearly what they are and aren't allowed to do with hardware, in this case it's 98% certain they were clearly told not to:
(1) Let any non-Apple employee touch the device
(2) Let anyone film / photograph the device (can't help someone taking a quick / discrete shot, but that wasn't the case here, it was blatant and her dad allowed it).
He deserved to be fired. I hope launching his daughter's YouTube career was worth his job.