Note in the vid the terrain that they're rapelling down. That looks like Mountain phase of Ranger school. I wonder if they snuck some early Ranger training in on us?
Additionally note the water ops with the M59 APC. This early model but bigger M-113 was a beast that info is hard to find. This is the first vid I've seen of it actually swimming.
Last consider the idea of the "Strategic Army Corps". This early "rapid deployment force" was suppose to out Marine the Marine Corps. That meant hard training and high standards of discipline and appearance.
That soon devolved into simply looking sharp. But the obvious remains. The Army's future lies in its past. The Strategic Army Corps ethos needs to be brought back...but done right.
It could literally save the conventional Army.