Mighty.Sun.Tzu
In the video with lighter hair she was referring back to her time on the floor with God experience as being about a week earlier... and with darker hair she seems to be referring back to that experience as having taken place about 9 months earlier. They very much seem to be referring back to the same experience.
In the lighter hair video she is very newly referring to herself as elizabeth and asking people to help her with this and 9 months later in the darker hair video she was much more fully established as elizabeth. In the lighter hair video, her name is even listed as Amy (Ward) in the video, and in the 9 months later video her name is listed as Elizabeth Ward.
In the baptism, she had another shaking experience that was probably similar in ways to what she had experienced 9 months earlier on the floor.
As Rainy said, in the lighter hair video, she is in make up and in the darker hair video not.. and her hair is shorter and differently styled in the darker hair video - and these factors can make a lot of difference in appearance - but seemingly she has the same age, height and facial features apart from the image the make up and change in hair style create.
I believe also that 9 months later and 9 months of God continuing to work in her, she had become a lot more openly passionate for God and abandoned to Him and this brought changes to her personality including being far less reserved.