How to Upload CSV to Shutterstock
Shutterstock's contributor Submit workflow can apply CSV metadata after your image or video files are uploaded.
Prepare the matching asset batch
Keep the filenames you intend to use in the CSV. A row cannot attach correctly when its filename does not match the uploaded asset.
Generate and review metadata
Check descriptions, keywords, categories and any optional Editorial, Mature Content or Illustration flags.
Export the Shutterstock preset
Use the platform-specific CSV rather than renaming columns from another marketplace export.
Use the CSV control on the Submit page
Shutterstock's current guide says to add the CSV directly from the Submit page rather than uploading it with the media through FTPS or the web upload page.