A list of the players who are broadcasting will be displayed, so pick one and click to enter. Once you have entered the players cast, you can interact with him using Spectator Chat, a chat where you can talk to the player and other viewers.
Casters will earn +2% of XP bonus while casting without password.
Use cast/cast (casts that no has password).
Use cast/correct_password (casts that has password).
[Client 10 and OTClient]
Just press enter the game (casts that no has password).
Use correct_password in the password field (casts that has password).
If you are a player and want to stream your game, enter your character and use the command !cast, if you want to put a password on your cast type the command !cast password, joao123, the word "joao123" will be your cast password.