This is an RAF Atlas transport aircraft on a low flying exercise in the
'Mach Loop' in West Wales.
It's in between the C-130 Hercules and C-17 Globemaster in size and capability but nimble enough to fly in confined areas at low altitude.
One such aircraft paid a visit to Scott AFB, Illinois, and gave some USAF personnel a flight around the area.
The video isn't very exciting but worth a look if only to see the spectacularly bad editing.
On the return to Scott, and about half a mile from touchdown,(listen to the altitude alerts) the aircraft is suddenly shown as flying over open country in a left hand turn before returning to the approach and the 100' call!