It is becoming apparent that Plex just cannot control my music and video as I wanted. All I am trying to do is to choose music from a tablet or phone and make it play on the computer connected to my amp or choose video and make it play on the Roku.
I have discovered that none of the apps (android or windows) ever find the Roku as a player so that the video can be flung to it. You have to use the web app for that. But using the the web app on the same device almost never finds the web app on the computer as a player to play the music, you have to use the android or windows app for that but sometimes even that won't find the web app on the computer.
Does anyone know of a media server which can do what I am trying to do?