I mean this with the utmost somberness: her choice and ability (whether purposed or incidental) to transmit her flight parameters condition through that sequence, will be her legacy for those of us still alive to learn from it. She did us all a solid in that regard, in spite of the reflexive recoil most people have to hearing that female shriek upon realization she's about to die. May she rest in peace; I cannot imagine for family members to have to be exposed to hearing their loved one's last frantic clamor. That's how people get legit PTSD; not everybody is built to disassociate the screams of their loved one sufficiently to not get "stuck" post-stress. It's usually why NTSB tends to clip those parts out, as it isn't salient to the safety angle. Digressing.
They will not find much useful in that missile crater. Hope they find the stabs, but I don't think they'll be in the crater. They're prob miles away, dozens away if the stabs broke when she first got the nose-down departure in the 30s. The video is useful, hopefully they can process the rendering to evaluate the absence of the horizontal stabs. All in all, this is extremely important 1st hand account we have. Occam got it from here.
People upthread already beat Occam to it:
1) Continued flight into worsening convective turbulence, worsening precipitation intensity as admitted by the crew, with also admitted difficulty maintaining static altitude (which you shouldn't do that anyways in a turbulent cell) before the control departure event.
2) The cell won: broke their horizontal stabs, the aggressive pitch down departure is textbook aerodynamic response, exactly as she's describing it on the radio.
3)Unrecoverable lawndart, with the vertical speeds to match. The video is not at all suprising. The audio confirms and is physics-compatible for the entire thing start to finish.
The real question here is: what's going on with the decisional aspect of paid flight in these circles? Folks are that job-fearful of saying no? I recognize the employment situation is weak right now, but I rather be unemployed than dead. I know why this happens more in limos than public buses, but for the sake of not being polemic in the same post as I'm offering condolences to the surviving families of the deceased, I'll digress and let the rest of the peanut gallery take it where this thing is going anyways.
Stay safe out there, and please practice saying no without fear in the mirror. Could help you one day.