Panopto videos are automatically archived 18 months after last being viewed.
If a Panopto video cannot be played because it has been archived, you will see a warning message to the right of the video informing you that it has been archived and must be restored from the archive before it can be viewed.
To restore a video from the archive:
1) Make sure that you are logged into Panopto.
2) Load the video.
3) Click the Restore from Archive button that appears below the warning message to the right of the video (see below screenshot).

4) You will see a message that Restore from archive has been initiated. The video will take 48 hours to be restored.