No, Dashboard/portal video access is subject to user authentication (except for the external live stream feature, but that isn't currently configurable via the API and is live only.)
One way might be to create a script, using the endpoint you mention, that would access the video link and download the clip to a file on a website that you control, from where it would be available to the unauthenticated user(s).
Otherwise you'd need to archive video on some external system that would give the control/access you are after.