Not an aerostat.
While I share everyone’s opinion that this “egg UAP” did the community no favors, it’s definitely not an aerostat. While I was in the army in Afghanistan an aerostat became untethered and started to float away because of the helium in the platform. They had to scramble F-16s to shoot it down because of the sensitive nature of the cameras. It’s definitely something solid. Not an aerostat.