Has anyone here determined whether or not the elevators in this hotel require a key card to operate? If so, that would explain why the elevator did not close for Elisa -- and it would also suggest that SOMEONE had to get on the elevator before it descended, to insert a key card to get the elevator moving. (This might be the answer to the mystery of the ostensibly altered section of the video: what's blurred out is the person who inserted the keycard.)
IAt the :12 second mark the door appears to be about to close but jerks back open. Why does this take so long after she's ostensibly pushed the button? Anyone with any insights would be appreciated.
Like you, I've never encountered an elevator that stands open that long. Were I to encounter one, I'd probably behave, at least initially, just like she did -- pop out of the elevator to look to my right (assuming that's where the call button is located) to see if someone's depressing it. Note that when she gets back in, she also presses herself to the side of the elevator that would conceal her best from someone approaching the elevator from that direction.
But yeah, she doesn't look scared. She looks like she's trying to catch someone who's playing a prank on her, at least in the first half of the video.
Wild speculation follows:
Have they found her glasses? Were there single guys staying on that floor who are near her age? The main reason I take off my glasses (besides when I'm about to fall asleep) is when I'm, ahem, cuddling with the mister. They're awkward to wear when you're kissing, especially if the guy you're kissing ALSO wears glasses. And if she's not as blind as a bat, I can see her leaving them off as she goes on some errand -- for vanity's sake, y'know? I can also see someone teasing her, saying, "I'll keep these to make sure you come back." That kind of flirty interaction after a makeout session might lead you, when the elevator door doesn't shut, to assume your new love interest is making a playful attempt to keep you on his floor by holding down the elevator button. It certainly would account for her body language in the first half of the video: suspicious but not frightened.