it seems you were right about the direction issue, Boardburner. I am video taping horizontal, and the blink happend simultaneously.
I had I zoomed in the corner expecting a certain result but did not get it. I am now zooming out to see how far the blink goes. I'll post an updated video.
the thing I shiuld mention again, is that I have it on only 10 percent of full brightness during the video, and when the blink happens, it seems like it goes to full brightness, but not brighter than that. Ofc, it happens so fast it's hard to be certain.