Probably? But then I'm using the "vpn slot" on my device all the time which prevents me from connecting to my work VPN when I need it without a little vpn disable dance.
And anyway it drains the battery; and maybe I don't want to add VPN to every device I want to listen to music with, like my PC at work.
That doesn't require public internet, you can and should use a VPN for that.
Would you still be able to do this if you put plex behind tailscale and connected to your tailnet on your phone?
Probably? But then I'm using the "vpn slot" on my device all the time which prevents me from connecting to my work VPN when I need it without a little vpn disable dance.
And anyway it drains the battery; and maybe I don't want to add VPN to every device I want to listen to music with, like my PC at work.
Normal Plex works using that way, so probably.