This is the most interesting video.
A few questions,
1. Is the area of contrast many are calling a parachute a physical object or simply lens flare?
2. If this is a far IR camera why is such a far off object overwhelming the sensor and producing bloom? Are there examples of this besides the sun or reflection of the sun?
3. Is the trail smoke or is it "persistence of vision"?
4. Is the object moving or is the camera moving?
5. If the object is moving would you expect the claimed diffraction pattern to remain as static as it is?
Bottom line I see how AARO has still not resolved this video even though they have had it in their hands for presumably many years. It is odd, and while at first glance you could come to the conclusion that it is just a bright heat source off in the distance producing a lens pattern I think there is more to this than that quick evaluation.