The video is hardly conclusive, but the humming sound is very eerie and the dog's barking is typical of canine reaction to UFOs. Given the nearby thunderstorm and the lack of proper lighting, it is improbable that this is a blimp. An apparent genuine unknown, and an excellent audio catch.
Sounds almost like a blimp. But that can't be because they don't launch them during a thunderstorm.
Where in Florida was this? Anybody know?