How it is done?
She was standing in front of a green screen, I used a black/white color effect. For the glitch aspect I used a plugin called mGlitch from MotionVFX; https://www.motionvfx.com/mplugs-13.html
I highly recommend any of the MotionVFX plugins for FCP X. In my opinion they are the best plugins for Final Cut Pro X!