These are various other items from the history of the Five Nights At Freddy's series that are not either teasers or trailers.
In order to tease the game, FNaF AR developer Illumix engaged in a teaser event on Reddit and through it's website, fnafar.com.
These two promotional videos were available to watch on the Five Night's At Freddys Steam page for an unknown amount of time. These videos are scare compilations featuring YouTubers such as Markiplier.
In the past, Scott has released multiple joke or "Troll" games, often claiming to be a free/hacked version of one of the then upcoming games in the FNaF series, but in actuality is a reskinned version of one of Scott's past games, such as There is No Pause Button. A few of these games have been released under the alias "LOLZ_HAX".
As mentioned above, Scott has in the past pretended to "LOLZ_HAX" (which is a alias of his). LOLZ_HAX would claim that he had hacked Scott and that he leak a upcoming game in the series. When the game was "leaked" it would end up being a joke game. These are the messages that LOLZ_HAX posted to FnaFWorld.com in their original forms.