MW stores the EXIF info in a database field that can be queryied from the API. A bot could check for the existance of EXIF info, for Facebook-Ids, for copyright notices, for author notices. --C.Suthorn (talk) 12:28, 29 January 2023 (UTC)[reply]
The metadata approach will also work for video files. While the meta data for video files is not displayed on file description pages, MW does read the meta data (and probably stores it in the database) C.Suthorn (talk) 10:54, 30 January 2023 (UTC)[reply]
Support I'm not a patroller and I'm not sure exactly what this looks like, but addressing the low patrol rate in Commons is important imo, Eiim (talk) 13:55, 13 February 2023 (UTC)[reply]