What you are about to look at is a A/H1-G D model Longbow Apache Gunship. They are working in concert with Special Forces, not SEALS, using laser designators to designate where the primary targets are. The buzz saw sound is the 20mm minigun , and the hack-hack sound is the 30mm chain guns. Of course you can see the hydra 2.75 rockets as well as the large explosions being the Hellfire Missiles.

It is a great light show, but know you are looking through an infrared night vision device so it can all be captured digitally. There's also a great clip of the "Night Stalkers" in their birds rolling in hot on IS with chain guns and penetrators, guided of course - by Special Forces (SF) with laser target designators.