I don’t think it’ll work because Plex gates everything with a sign in to their online accounts, so auth would have to go through them and there might be server-to-Plex verification going on too.
That said, I’m very interested in this space - I’ve been building a music server that provides compatible APIs for Synology and QNAP mobile apps, with a few more on my todo list. I’d love to include Plexamp so if it is possible please let me know!
> I don’t think it’ll work because Plex gates everything with a sign in to their online accounts...
That isn't true. You can configure the server with which subnets are trusted, and do not require auth.
I would be interested to hear from anyone who set it and can still access Plex over their LAN in a network outage. I have set this multiple times according to docs, and it worked only once ever, thereafter apparently resetting to online login. Of course, they do not make this an easy setting to change!
You need plex pass to do this now. They changed it recently you didnt used to need it.