A Unit might choose to bulk upload their data if they wish to collate their review data on a spreadsheet outside of Elements and periodically upload the data into the system. Uploading data in this way means Units don't have to ensure their authors/reviewers are trained on how to access/use the assessment module.
To complete a bulk upload, Unit Managers download the relevant bulk upload CSV from the Management area of the assessment module, add to or edit the information, then reupload it.
The slides used in the video are linked below the video. Slide 6 contains instructions and links to find the ID numbers (for users and publications) required to complete a bulk upload.