It's pretty strange that someone lost their livelihood solely because they didn't bow to authority. (As opposed to a practical reason, like "what he did mattered.")
In the video, we can see an email on his phone marked "restricted" with a project code name and some other details. That could potentially be harmful. His daugher is probably not allowed to see that, let alone post it on youtube.
Not to mention, they want to tightly control the message prior to the pre-order sale... they don't want any unfinished software on the device changing people's opinion and affecting pre-orders unnecessarily.