This is incredibly interesting. I came across Tony Ortega's post about the secret Scientology bases scattered across the US and noticed that there's a YouTube playlist of flyovers done via Phantom 4 drone.
It seems so obvious now that people would do flyovers of these places now that aerial drone technology is so prevalent but this is the very first one I've ever seen. I'm assuming there are more out there. Many of these secret bases/headquarter facilities are located in Southern California (see: Gold Base (also the site of where the infamous "Hole" is located) and are usually surrounded by heavy security.
With more time and more interest in the dealings of Scientology (especially with Leah Remini's recent tell-all TV series about it) I can only imagine that videos like this will become more common. Probably in everyone's best interest.