This doesn’t appear to be a bird, plane or balloon. It’s far too thin to be a balloon and in any case is not flying. It shows no reaction to the air mass at all. It is held aloft by something that does not rely on air like a wing or gas bag. Toward the end of the video, the object slowly turns end on, until it is just a dot. Could it be a CGI effect? Yes, but your Out There editor is giving it the benefit of the doubt. Probable genuine unknown.

Story Source:
https://www.youtube.com/watch?v=fePFEMuTe5c