Quite contrary, IMHO. Something has changed. Seems to me, she has gotten information that the ransom appears to be proven a scam and not related to her mother's disappearance or just as she was about to hit the button on sending $6 million to someone--LE had to let her in on where they are at in the investigation and it's pointing elsewhere like many here have said. She's now in the loop with LE, so to speak.
Ok, so I'm going down this rabbit hole and now LE approaches and says hey wait a minute--here we have x,y,z. After the initial shock, your like ok. I'm composed I know what to to expect next. We need your help finding mom. Yes, I do believe that she's come to terms that this is a recovery effort based on what LE told her. Now, she's appealing to the public to find mom's body. As morbid as that is to write.
That's how I'm reading this latest video.