first impressions about the video:
It seemed to me that she got the chloroform part from a written source and not from hearing it in a conversation because she wasn't remembering it by how it sounded but trying to pronounce it by its letters.
Also, her body language when talking about the supposed conversations with Casey (in which Casey supposedly confesses all this stuff to her- LOL!) appears deceptive: the embarrassed laughter, the swallowing, the inappropriate smiling, the breaking of eye contact, the raising of her eyebrows, the touching of her face, the shaking of her head, trying to hide behind hair, etc. I was embarrassed watching it. During some parts of the interview she seems less deceptive and these mannerisms stop, when talking about more everyday topics.
She seems awfully impressed with herself, doesn't she? You'd think she was a saint. That's very hard to watch. Of course it is very sad to see any person who is so young, and apparently intelligent, in such an awful situation, having committed such a serious crime. Much sadder for the victim and her family of course, that goes without saying, but also for MD's family. What a shame when her family came to this country she apparently got in with such a bad element.
Anyway, it sounds like she's pretty much just regurging the popular rumors because in reality, I don't think chloroform would be very useful for drugging a child for the night, I don't think it lasts long at all, it's more of something that an assailant might use (in old times anyway maybe not today) to instantly knock someone out, but they would wake up in a matter of minutes I thought. But not to drug someone to sleep for the night, I don't think it works like that. And how could she have it hanging around, where would she keep it, etc. Seems unlikely. IMO
I would be more inclined to think if Casey ever had chloroform in her trunk, it was for another purpose.