Opening to custom media folder from notification action

I have some folders within the default media directory, is there anyway i can open directly to one of these folders or files within these folders from a notification action?

I can successfully open the home assistant app directly the “Media Sources” page with the following action:

    "action": "URI",
    "title": "View image",
    "uri": "media-browser/browser"

But then trying to go any further directly from the notification gives me “Invalid media source URI”.

I have tried the obvious "uri": "media-browser/browser/media" and "uri": "media-browser/browser/local", but all gives me the same error.

Is this possible?

I know i could probably save the media in the www folder and it would work but doesnt this defeat the object of keeping it secure in the media directory?