What is this plane? It kept circling overhead and I managed to get a picture during one of it's passes. The only parts I could see was 4 piston engines, straight wings, and a tall tail with some obscure markings on it.
This looks like a C-130, as features like the bulge for the landing gear make it fairly easy to make the comparison.
For reference, here is a C-130 in flight:
The first image even appears to have the same markings as shown in the footage.
Military practices quite often will require an aircraft to hold a position, and could have just been circling for that reason. These aircraft are primarily used for lifting and aerial refueling. I do not see any refueling pods on the reference though, so it appears to be an unconverted plane.