Canvas@Illinois , Course Navigation Menu
This page has a link to Canvas documentation
The following contains information on the Course Navigation Menu, including how to show and hide elements: https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-use-the-Course-Navigation-Menu-as-an-instructor/ta-p/941
You can use this to add a Kaltura media gallery and My Media, as well as other tools.