Did I Just Video a Glitch in the Matrix?

If you watch, the seagulls are flying forwards, so you can tell the video is not reversed. I only slowed it down and cropped it to show the black bird flying into frame, but is he flying backwards?? The following two clips are normal speed, the original video and just cropped normal.
So what do you think??? If needed, I can upload the entire video so you can see for yourselves that I didn't reverse it... cause all the flying birds would be flying backwards and he would be the only one moving forwards if I did reverse the entire video... but I didn't.