Sorry for the delay, Mark - hope the following information helps.
Each of the Use Case Scenarios includes a "link" box below the text response. This must be a URL that is viewable by anyone who sees it, ie CHIME and the judges. The URL can be a link to Google Drive, DropBox, or any other platform as long as you ensure that the link is viewable by anyone who has it.
We strongly suggest that you link only to an image, to support readability for readers. Only one link per Use Case Scenario is permitted. We encourage you to include any additional images for particular Use Cases in the supplemental information.
And for info on video uploads:
Detailed instructions on how to upload your videos are available here: https://chimecentral.org/npid-video-upload/
. Review the instructions carefully, test your video uploads now to ensure that you have no issues