Teaser Videos

Replacing the typical image teasers of Five Nights at Freddy's normality, the teaser videos are a series of short videos which tease elements of the upcoming Five Nights at Freddy's Plus. As of right now, six teaser videos have released.

Connection Error
Connection Error is the first teaser video released for Five Nights at Freddy's Plus. It was posted on September 12th, 2020. This teaser video is filmed from a security camera within the Dining Area, which surveys the empty and dark room. Eventually when the camera pans to the right, Bonnie is seen standing between the tables, before vanishing after the camera pans to the left again. At the end of the video, the camera pans left onto a close-up of Bonnie's face, his eyes lit-up and causing the security camera to fail. This results in the titular "connection error", flashing on the screen over a map of the pizzeria.

Routine Check
Routine Check is the second teaser video released, one of the four show tapes released on January 19th, 2021. The teaser video is a reel of the Freddy animatronic's many animations. They go as follows:
 * 001 - WAKE UP: Freddy wakes up from a deactivated state, moving around with his jaw occasionally snapping open and closed.
 * 002 - LOOK AROUND: Freddy's eyes dart around, before his body starts to turn to look around the area.
 * 003 - AUDIENCE GREETING: The camera, closer up on Freddy, watches him raise his hand and turn around, his jaw snapping open and shut again as if talking to people nearby. This animation is a reference to the one Freddy does in the first Five Nights at Freddy's trailer.
 * 004 - SMALL TALK: Freddy jolts upwards, looking to his right and holding his microphone to his mouth. He speaks into it, whilst slowly turning to the left. In this shot, Bonnie can be seen eerily standing in the background.
 * 005 - FRIENDLY LAUGH: The last animation is a close-up of Freddy's face, who closes his eyes and leans back to chuckle. His eyes then open, albeit wider than normal, and is followed by deep laughter that continues even after the video goes black. A loud buzzing can also be heard as the deep laugh begins.

Night Mode
Night Mode is the fifth teaser video and, is unique in how the video was originally unlisted. To find the video, fans had to decode the hidden message embedded throughout the last three videos. Turning the series of characters into a YouTube URL led to the link to Night Mode. As of now, Night Mode is public, albeit age-restricted for an unknown reason.

Night Mode is also unique in how it's the only teaser video that's from an animatronic's perspective as opposed to a recording. This video is from the perspective of Foxy, who's remained unseen throughout these trailers. Starting in Pirate's Cove, as the curtains get drawn Foxy's head turns to the exit door far in the darkness, where the footage glitches out and becomes red, with heavy breathing on top of it. Imagery quickly cuts over the footage as well as music, as Foxy is seen running through the Dining Area. After a few seconds of darkness, the video ends with Foxy walking through the building, looking up at the illuminated red exit sign.

Breaking + Entering
Breaking + Entering is the sixth and final teaser video. It was set to premiere on August 8th at 4pm EDT to commemorate the anniversary of the Five Nights at Freddy's franchise. It was announced on August 2nd. According to Phisnom, Breaking + Entering is set just before the events of Five Nights at Freddy's Plus.

The teaser video is about "The Ghosthunter", presumably a child judging by their high-pitched screaming and crude drawings, breaking and entering into Freddy Fazbear's Pizza to investigate the paranormal going-ons in the restaurant, all while recording it for their fake show, "The Paranormal Investigatorz". While from their perspective, the video often interjects with shots from the camera feed of the restaurant. The Ghosthunter investigates the Show Stage, showing a close up perspective of all three animatronics. They then investigate Pirate's Cove, only to find that it is empty. They travel down the West Hall, examining various pictures drawn by children, as well as the rule board, before glancing up at a security camera. The viewpoint switches to the camera feed, showing that Foxy is standing in the hallway as well. Finally, the Ghosthunter goes to the Security Office, until Foxy appears in the doorway. The video then cuts, coming back to show that the Ghosthunter is running away from Foxy. They end up in the Backstage, and notice a worn Freddy suit. They move to get a closer look at it, but are frightened by something, and the suit's head falls off. They move to check the door, catching a glimpse of Foxy, who is standing outside. They hold the door shut in an attempt to stop Foxy from entering the room, but are eventually overpowered. The door slowly opens, and what appears to be the Puppet's mask can be seen. The camera feed cuts again, and when it comes back, the camera has fallen the ground on its side. Foxy can partially be seen in the doorway, but eventually disappears, before the video ends.

Points of Notice

 * There are several hidden messages throughout the video, hidden within the glitches of the feed.
 * Foxy's initial absence from the Pirate Cove clues into the idea that this video takes place after Night Mode, which depicts Foxy escaping the Pirate's Cove.
 * A lot of the paranormal disturbances that happen within the video mimic hallucinations from the original Five Nights at Freddy's, including the poster of Freddy ripping his head off, and the spare animatronic heads staring into the camera.
 * The worn Freddy suit in the Backstage is a reference to the game over screen from the original Five Night's at Freddy's, and likely contains the body of a former guard. This is further emphasized by the eyes on the suit, which seem to be human eyes.
 * When the Freddy suit in Parts and Service is shown near the beginning of the video (around 1:57), text flashes onscreen, which when pieced together forms a letter addressed to an employee of Fazbear Entertainment, chastising them for allowing a camera to be damaged the previous night. This seems to be a reference to the first teaser, Connection Error. The text is as follows:
 * "Dear [EMPLOYEE NAME], A handyman has been called in to work on repairs for the surveillance camera that was damaged last night.  Our intern has also already ensured the appropriate replacement of sensitive material related to your mistake, a clean video feed archive of "CAM 1B" (The Dining Hall) will be used as substitute for the missing portion of footage left on tape. We would like to remind you that, as current night watchman of the restaurant, you are required to notify us of any documented irregularities during your shift and provide us with the name and timestamp of the footage for prompt review.   Keep in mind that although Fazbear Entertainment values the safety and comfort of our staff, we also value our company property just as much. Please make sure to take the necessary steps to prevent accidents like these from repeating in the future.  The cost of repairs and maintenance for "CAM 1B" will also be deducted from your next paycheck.  Thank you,  -Management"

Trivia

 * The teaser videos are likely inspried by the trend of FNaF VHS videos, spurred by YouTube animators such as Squimpus McGrimpus and MemeBear.
 * The songs played are Follow Me (feat. Daisy) by Dream Valley Music and Say Goodbye to Spring by Josh Woodward in the 3rd and 6th teaser respectively.