Simon did all of the video editing shown below:
Below is the media storage of all the clips. Some are disconnected but on the route of producing the thriller intro, we managed to learn how to reconnect media files.
Below is the first part of editing, showing the scenary and her entering the house.
Below is just a further edit from the previous screengrab.
Below shows me, Simon, cropping a video and overlaying it onto another video file to make both of the girls appear on the CCTV as they are both played by the same girl.
Below shows me slicing the clip into little pieces to give it a flickering/flashy effect of the dead girl.