Whether you’re in the context of a playlist, collection, or album detail (anyplace where there’s a list of items), the Get Info > Next button should walk through the list.
I hadn’t seen that. Yes, I’m suggesting a similar feature. I would not have considered the ‘Edit’ and ‘Get Info’ modals to be so similar as to be covered by the same suggestion.
Adding navigation buttons to move between media items while in the ‘Media Info’ view in Plex would save lots of opening and closing of this dialogue. I have provided a suggestion in the image above.