The T45 Flightdeck is operated unmanned (apart from aircrew) when conducting rotor start or stop and T/O or Ldg. Not sure about the Seahawk's flight phase, they have some different ways of transitioning to the RN. Nothing suggests to me that it's not a launch, a glance at the relatively small flag & ensign on the mast suggest a gentle R20 wind supplied by the bridge. 1st time for everything I suppose!