Instructors can make hidden Panopto videos available to students on a video by video basis.
To make an individual Panopto recording available, click the “Panopto Recordings” link on the left sidebar of your course Canvas site. 
Once you are in the Panopto Recordings page, find the recording you want to make visible. It should have text underneath the title and date that reads “Not available to viewers.”
Hover your mouse over the recording, and a few buttons will appear. Click the “Publish” button. 
The recording will immediately publish and be visible to your students, and the “Not available to viewers” text will disappear.
Note: Unlike Canvas, Panopto does not have an “unpublish” button. If you want to unpublish a recording, you’ll need to click on the “Settings” button, scroll to the bottom of the window that pops up, and change the availability to “never.”