Is this a new file or something you originally added a long time ago?
If it was match as another copy of an existing movie in library you can filter for duplicates. the get info on those to see the file paths
If you do the plex dance then when you add it again it should show up new in recently added row ( assuming it did not get matched as an existing movie in library)
You can use Webtools to export a csv file WebTools-NG
