I turned on the DLNA server for my Plex Server because of wanting my 3D movies to work better. My PS3 Plex won’t play Full Side by Side correctly, which I encoded, and doing them as Half SBS the picture won’t play, audio does, but using DLNA to play my Plex H-SBS it plays wonderfully. (This is connected to my Playstation 3D Display)
I have the newer Chromecast dongle connected to the display as well, and using Plex app on my phone or tablet or Chrome on PC to cast my 3d H-SBS movies it also works wonderfully.
In both cases though I have to turn on 3D Side by Side manually.
I have not done much testing with this on my Sony 2015 3D Android TV yet, a PS4 there as well as on the Home Screen, Plex Apps are big trouble for 3D.
I can use the native VIDEO app on the Sony Android TV to play from Plex DLNA server and 3D works out of there, from what I have tried. I’ll be testing more out in morning.
I wanted to do Full Side by Side for all my capable 3D movies, but it’s not working right on my Playstation Display, so Half SBS will have to work for both my 3D screens, and that is what I’ve not tested on my big 3D tv yet.