At the risk of the usual derision ... that looks like a UFO ... e.g. has often been involved with rocket launches and rocket malfunctions.
I grabbed those by pausing the video, playing at 0.25% speed.
Others can try it and perhaps capture additional frames to fill in between the ones I got. I thought bird, like the earlier ones, but those could be seen changing brightness/shape as they flapped through their various trajectories.
This seems a bit different, very fast, and the timing, well... Can’t swear it’s a bird.