When i try to add an account to youtube tv it removes me (the family manager). I can go back to add my account but it removes the new user. Both users are working on the newer smart TVs. This is only a problem with the Chromecast with Google TV.
When I installed this a few weeks ago it worked on all of the TVs and all of the devices.
Hey there Lyteman,
I apologize about the late response, thank you for being patient! I'm sorry to say, but the Chromecast with Google TV only supports one main user at the moment. They are looking at adding multiple users in the near future, which should help with this kind of issue. While they are working on that feature, feel free to submit feedback to let Google know it's something you'd like to see.
I'm sorry I couldn't be too helpful, but if you have any other questions or concerns for me, please let me know.