Navigate to the Canvas course in which you want to delist the videos from the Canvas > Mediasite section.
Click on My Mediasite button in your canvas course, and then click Authorize
Click on the Search Icon, and enter the course ID, semester or title of the video and press Enter
For example: MEDE.8810 Spring 2019
Select a video from the search results and click Edit Details
In the Modules section, click on the Trashcan icon next to the Course ID to remove the video from the Mediasite listing
Note: The video will still be available in Mediasite, but it will not show in your course.