If the right duct is constantly closed all you have to do is focus on the camera and the window in front of you so you have to seal the right door as long as possible, it's the "right" button. If you see springtrap behind the window you press "up". If you see springtrap on camera press "left" for block it and after press "right". You have to manage the phantoms as quickly as possible so as not to let Springtrap move forward without you being able to see it. However it is always possible to stop it despite the presence of phantoms because each time a phantom or springtrap moves there is a fade to black to warn you. It is more a game of strategy than a game of reflexion, it is better to think before doing something because the slightest mistake can be fatal.