Panopto organizes videos in folders according to course. If accessing a video recording from a previous class, the course folder will need to be selected. After navigating to Panopto from the D2L course, select Browse from the side menu, then select My Folders and the name of the class in which the video was recorded.
If attempting to embed a video from a previous course, follow the directions for Embedding a Video. When completing step 9, use the "Everything" dropdown menu at the top to select the appropriate course folder.