My husband and I watched your first link over coffee this morning. We will watch the second one later on.
We had some OSPREY flying in our valley a couple of years ago. They were doing a show or practicing - doing drills in a valley (?). We got the best views out of our north windows facing Snow Bowl ski resort.
We used to go camping in the desert on Southern DPRK close to the area where they practice low level flying, with a giant American Flag as our sunshade.
It worked to draw jets like you wouldn't believe. One A-10 blasted over our camp real low, causing one of our party to sustain a battle injury - dislocated his elbow getting out of the tent to take a photo.