Using course tools>>Collaboration tools
To remove a recording of a collaboration session:
Click the course name on the My CourseCompass page.
Do either of the following:
Click Communication in the course menu, then click Collaboration.
Click Control Panel, then click Collaboration under Course Tools.
Click Recordings to the right of the collaboration session you want to view.
Click Remove next to the date of the archive you want to delete.
To confirm the deletion, click OK.