Check the difference of where her hands are set in her stance. In the first slo-mo video they are in a pretty good position. In the full speed video they are too high and the bat is flat.
Having problems getting daughter to learn to go from launch and to swing away from her body more. As you will see in this video she turns the barrel, although not fast enough, but it is like her hands are tied to her back shoulder and then follow through she breaks down and gets it quickly to the left...any helpful drills or mental aspects will be appreciated.