How do you play/stream media from your server during offline hours?

Hi there!

Wondering what types of setup people have that allow them to, while the internet is down, still watch/stream media from their servers. I have a stacked Jellyfin library that, and would like to see this feature/setup in my own house. My Unraid server is on the other side of the house from where the living room is. Is there actually a sane way to achieve this?