Did you watch the video? The pattern from the laser did not show ground-based people shining something up. It was several "shots" and it traversed across the sky with a single point of origin from above and several points of "impact" below.
I did but I am confused. Its hard to tell from the video. Its seems to be a time laps. I don't see how a single satellite can produce multiple beams that are quite far apart.
Only an open aperture time laps could explain it.
My first first guess was time laps of StarLink track line passing over head. Why its green I can't explain.