>>3101830 (pb, smudge on helicopter window guy)
It's not in focus the way it was at 00:21 and it's not in the center of the frame either, but If you want to believe that smudge is a craft, you do you. It only has any darkness to it in a couple frames of one second of the video, and can be seen in what would be the same location a few seconds later as the camera pans past. It's less dark because this camera is a literal potato. I've given you my honest opinion backed up with screencaps and you've come back with "P.s. that's craft :)"
Shout it from the rooftops, then, fam! You'll undoubtedly find others who are happy to believe in what you think you see. But I'm not one of them.