I've watched it a couple of times. It's hard to evaluate from the YouTube copy– maybe I can ask the guy who shot it for the original.

Looks like the images are pareidolia. In the first image, they're shooting through a spiderweb, and I think that's what the girl is– criss-crossing spiderweb strands with some dew on them. It might seem strange to get that kind of image by chance, but it does happen. A few things to pay attention to: her left side is cut off, so our brains tend to fill in symmetry when there's none there. Also, the entire image is actually defined by just a few lines. Here's what I'm talking about.

I think that what I've highlighted in red is spiderweb, and the blue is either a dewdrop or the spider itself.

The second one had me looking closer, because the "body" seems to fade up dramatically. If you frame-by-frame it, though, it looks like the body fades up twice, and both times when the flashlight point is at a particular angle to the chair. I think it's a reflection of some kind from the chair. The back of the chair is contoured, and the body seems to match the contours.

There's always the possibility of a hoax with this kind of an image, and my deconstruction could be a kind of reverse pareidolia.

On the stills from the first video, I don't see anything to make me change my mind about it being a spiderweb. In case you didn't follow the link from my first post, let me try including it again:

That's the "child" image with the dominant lines highlighted in red. I think that those lines are spiderweb, and that the blob I've highlighted in blue is something caught in the web, or maybe the spider itself.

If you'd like, you can PM me with the URL for the full-res video and I can see what I can figure out for the second one. I still think that the figure is caused by secondary reflection from the chair.