I have them handy here. Have included the originals and the one with my points of interest.
I see the “hairs” someone was on about, but this is why I thought the picture might have been snapped from a computer monitor. To me it looks like there was something to Edit out in this area of the photo, and people were touching the screen with their fingers leaving the white smudge. Then touching the screen with a pen nib, maybe pointing out smaller areas? Or maybe they were trying to work out what the black thing on the floor was, same as us, so were using a pen to point to it because it’s a small item? I do it all the time in work when pointing to a specific area of the screen, I always have a pen in my hand so it becomes my “pointer”