Yeah I think the activity is not exercise.....US intelligence must be tracking various threats to military and other facilities. See the recent news reports about bomb threats. Just the sound of the comms - it appears that this CAP process was not previously planned. The fighter to Huntress comms seem realistic as though they have been briefed on threats and are interrogating possible targets.
COSMIC beginning YOYO ops. As defined nicely here
YOYO!
One of the most prevalent missions flown in recent conflicts was Close Air Support, or, CAS. In many of these scenarios, there was little to no threat to fighter aircraft from enemies in the air or on the ground. To boot, some of the on-station times for these sorties were incredibly long, at least by fighter aircraft standards. So it was not uncommon to execute what was referred to as “YOYO ops”, which is a fitting word, both as an acronym, but as a visual representation of the operation. With a 2-ship of fighters, you may have had one tanker above the area of operation. One fighter would be on-station executing CAS, while the other fighter was on the tanker aerial refueling. Then, the two fighters would swap. You can visualize this “yo-yo” over time: one fighter goes up to get gas, the other descends into the fight, and repeat. The term was also fitting because the single fighter was on their own. The flight lead would clear the wingman off to execute YOYO ops, in other words: “2, You’re On Your Own!”
Not sure on the source but it seems valid explanation......https://walkthetalkfoundation.org/yoyo/