You can delete screencast slides from a course or delete the source recordings from the project file altogether.

Deleting a Screencast You've Already Inserted into Your Course

To delete a screencast you've already added to your course, just select the slide(s) where it appears and press the Delete key on your keyboard.

Deleting screencast slides doesn't remove the source recording from your project file. That means you can insert it into your course again later if you change your mind.

Deleting All Unused Source Recordings from Your Project File

To quickly remove the source recordings for all unused screencasts from your project file, go to the Slides tab on the ribbon, click Insert Recording, and choose Delete Unused Recordings.

Articulate Storyline adds “In Use” tags to screencasts to help you identify the ones that are currently being used in the project.

Deleting a Specific Source Recording from Your Project File

To remove the source recording for a specific screencast from your project file, go to the Slides tab on the ribbon, click Insert Recording, and select the screencast you want to delete. (Source recordings can't be deleted while they're being used in your course. Storyline adds “In Use” tags to screencasts to help you identify the ones that are currently being used.)

When the screencast preview window opens, click Delete Recording in the lower right corner, confirm your deletion request (if prompted), then click Cancel to close the window.

You Might Also Want to Explore:

Recording Screencasts
Inserting Screen Recordings
Editing Screen Recordings
Exporting Screen Recordings