Not OP, but I wasn’t able to get Plex running natively. It’s not listed in the software center to install (a lot of apps seem to be missing) and trying to play video through the web browser would cause it to freeze, requiring a force-quit (both Chromium and Firefox). I may be able to install it through Command Line if I enable Developer Tools, but an easier solution might be adding it as a non-Steam app on my Desktop PC to stream to the Frame.