Filming by anyone (cabin crew or pilot) from the Flight Deck below FL200 is a “no no” where I am..except if it is done by one of a group of company approved pilots...(who are supposed to have presented a safety case prior to approval.
It’s a relatively new and controversial policy, and TBH looking at the content of some of the approved stuff going out onto social media I’m not sure some of it does us any favours..