If it’s any more difficult than plugging a network cable into the Vero then something is wrong. Have you got a customised network setup? Are you using static IP configuration on the Vero?
Ahh, ok things become a little clearer. For Kodi most users (I’d guess 90+%) will use either nfs or smb protocol to access the media files on the NAS. So using UPnP would be an unusual approach.
On the Mede8er, can you describe the steps from the home screen how you play back a movie? I’m trying to understand whether you are scraping movies over upnp or directly accessing the movies over upnp using the files interface.
To understand your experience and see the best way to help you, are you comfortable in using the command line and navigating around linux?