This depends on your subscription tier. Basic plans typically allow 2-3 simultaneous streams, while premium plans may allow 5 or more.
Generally no, unless you factory reset your device or manually log out. Some devices may require reauthentication after major app updates.
No, each code is unique to a specific device session. You'll need to generate a new code for each device.
Simply restart the activation process in the C4.TV app to generate a new code.
Some devices may allow direct login with email/password, but code activation is the recommended method for most TV-connected devices.