These steps are used to link your big screen devices like Android TV, Smart TV and Apple TV etc. As you know, typing your password on such devices can be a bit tricky. To save you from having to enter your password on these devices, Plex and other services like YouTube use this 4-character login code method to connect your account. On your TV, choose the connect option on the screen. You will now be able to see a 4 character code on your TV screen.