Your script represents the contents of the narrative of your e-learning video, the spoken words while the video plays. It may also be presented in visual form, as closed captioning or words printed on screen as the video plays. In either case, the narration must be added to the video in Camtasia Studio.
An approach that may work well is to record the audio separately while reading from the script. These topics are covered in detail in Chapter 5, Recording Basics.