I tend to agree that the debunking video is a little too sure of itself with regard to the speeds, though I think we could also be over-estimating the competence of the crew in the videos. Maybe they thought it was moving fast because they didn't take the time in those moments to read their instruments. As for the shapes of the objects, I would accept that they are most likely planes, and the rotation an artifact, but this doesn't rule out the possibility they are some classified new aircraft.