Actually I’m the first one to agree with you, but that footage was neither grainy nor from a unreliable source. The news crew DUPLICATED the find with their own cameras and equipment. The video from the news camera was not grainy. The darn thing was moving so fast that was the best the camera could do.
The NEXT STEP is to get a 60fps 1080p camera out there and do it again. And also simultaneously set up a high res slow mo camera pointed in the same direction on the off chance you can fire it for a couple seconds and get some 500-1000fps video of it.
Not hard, someone just needs to get out there with HD equipment with a high FPS to actually capture the movement.
First, start with a 100 yard baseline, 2 identical cameras focused on a common distant point would allow triangulating that could easily eliminate the insects theory.
Widening the baseline, if insects are ruled out, would give a reasonably accurate distance, which would allow a size parameter to be calculated, which would give an absolute speed range, rather than just an angular speed.
Based on that, the next step would your more expensive equipment.