How to split an object in a video
I'd typically tackle something like this in After Effects, but since Premiere Pro is the restriction here, lets give it a go;


Screenshot/Screen Record the application you wish to deconstruct.
Import the footage into Premiere.
Count how many components you'll be splitting the footage into and duplicate the footage that number of times.
On each duplication, use the rectangular mask in premiere to isolate the different components of the application.
You now have control over the position of each components you isolated. Use positional keyframes to animate as you wish.