In this video the host create the relay connection and share the join code with the rest of the lobby.
If you have any questions, please leave it in the comment and I'll make sure to try and answer.
00:00 - Intro
00:26 - Add start button listener
01:55 - Create relay connection
07:26 - Join relay connection
09:31 - GameLobbyManager StartGame
16:05 - Demo
16:55 - Outro