Video URLs pulled into SAB?

We are working on a project outside of SAB and also drawing from The Bible Brain DBPv4 API.

When trying to pull the Lumo videos from the API we are experiencing issues because it appears the video URLs are unsigned.

The m3u8 video URLs provided by the Bible Brains API return 422 errors. For instance, when we try to access the video URL that is returned for the endpoint bibles/filesets/ENGESHP2DV/JHN/1, we get an unprocessable entity error from AWS. I suspect that this is because the URL is unsigned. Is there a way to get the presigned video URL instead? More background here: Sharing objects with presigned URLs - Amazon Simple Storage Service for more information.

Do any of the SAB developers have some insight into this?