Hi aemmarc,
Just checked back with my team. For the source videos, the namespace is defined as what's shown from the screenshot I've provided (RetouchingWorkflow, Setlocation, etc.) and the metadata appears as we intended (Video, NYS1, etc).
After editing and exporting the videos through Media Encoder or After Effects, it changes from what was defined to "pantry <namespace>" (Pantry Retouchingworkflow, Pantry, Setlocation, etc) and the metadata from the source videos are still intact.
Here's a screenshot of comparing the results I get between a source video and edited video uploaded to AEM.

It appears that extra word "pantry" is preventing the metadata from populating in AEM. Is it possible to export videos without "pantry" attached to the <namespace>? The goal is to populate the AEM page with the metadata from the edited video. I forgot to clarify, the first screenshot I provided shows the namespaces and metadata from both source video (left) and exported video (right) read from exiftool.