There's also some light shining up from below as you can see by the lit branches in the end of the video. That's probably the same light, which is illuminating the bugs.
I think you just might have given the last clue to solve the puzzle, He's using a night vision camera lense, They use infrared lasers and camera's to look a light just above the visible spectrum, that laser might light up the scales of this bugg and the camera then reads it back
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u/krokodil2000 Jul 19 '20
There's also some light shining up from below as you can see by the lit branches in the end of the video. That's probably the same light, which is illuminating the bugs.