Ok, just bought a much newer Samsung and it's much worse. Looking through post here this one runs the Tizen OS I guess. The Mezzmo app is not offered in the store. With the TV above, it turns out I did not need the Mezzmo app since after a while, my media servers magically appeared as Inputs on the menu. That's been working fine. Or, maybe installing Mezzmo allowed that to happen?

When this new TV "found" my Mezzmo 5 server, it was quickly added to the device list automatically as Samsung C. So it see's the server - or the server got a request for it and "allowed" access. But I can't find anyway to connect to the server to play content. There is no new input that represents the server. Maybe in a few hours the new "input" will just magically appear.