Network IP problem

[Dodgie]

Gday.  NAS, LGTV and my Mac are all connected to my modem by ethernet cables.
The NAS and LGTV both have Jellyfin installed.  Media files are on the NAS.
But I cannot work out how to get the LGTV Jellyfin see the NAS or media files on the NAS.I understand that I need to give it an IP address to look at but nothing I try works.
I'd appreciate guidance
.

[Dodgie]

Update - I installed Plex and it all worked! I'd still prefer though to use Jellyfin - if I can make it work.