On an EchoVideo section page, add a button for bulk "Make Available/Make Unavailable" to adjust the availability status for all videos and/or all course content in bulk, as opposed to on a media-by-media basis. Use cases: instructors may want to reveal/hide all (or most) course content in prep for tests and exams. controlling out-of-term access. Some instructors are happy to let students access content out of term, while others are not. This feature could allow instructors ability to easier control that availability.