Use Playlists to create collections of video or audio files in Microsoft 365

Does anyone know where the link to the video is stored in the Playlist?  If I look at the 'All Items' view and hover over the Thumbnail, it has the link to play the video.  However, if you view the details for an item, the Thumbnail column only contains the link to the Thumbnail image.  From what I can tell, the video link doesn't seem to be embedded within that Thumbnail data.  If you copy the thumbnail URL into a browser, it simply downloads the thumbnail image. There's no column or reference to the Video URL there.

For background: I am using the PnP Search web parts to search the playlist and can return items from the list, but the link on the returned item(s) opens the playlist item.  I would like to map a Managed Property to the actual URL to the video so that when a user clicks the link on a returned video, it plays the video (not just opening the item details).  I've mapped all sorts of Crawled Properties that may contain that data (ows_Thumbnail, ows_VideoLink, etc.) and none contain the actual video link.  The video link has to be stored somewhere in the list (and as such should be indexed by search), but I can find nothing...