The black dot to the upper right is a bird. The white dot just to the left is debris from the explosion.
https://www.youtube.com/watch?v=fVFBXCfFopM&app=desktop
Watch the top right of the video. What you say is a bird goes from right to left very fast, not a bird at all.
Here’s a good frame by frame shot at ATS. It’s definitely in the video too. There’s no way that that’s a bird.
http://files.abovetopsecret.com/files/img/xi57c8f766.jpg
That “bird” moved incredibly fast if it was a bird. And it moved behind the rocket (from the perspective of the camera.)
I am not suggesting its aliens or a rifle shot or any of that crap. But birds do not move that fast.
The only explanation I could think of is a flying insect very close to the camera, but it appears to move behind the rocket.