I put together an image to better show what I think were "her" fingerprints.
It looks like something obviously disturbed all the dirt and dust there. Though it's off to the side of what we see in the video, I'm sure they had to do at least a dry run and maybe even 2 or 3 takes to get this right because the guy was running by at the time.
I believe because of her height, she had to pull herself up slightly using that ledge and I imagine might have been standing on her tippy toes.
As far as could someone else have done it? There is a doorway just off to the right that you see in the video. There is no reason where someone would have stopped there to look through the window, when there was a wide open doorway only a couple of feet away.
I rest my case.
Attachment 3106