they break the fourth wall
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#TubeClash - The Movie
The ten protagonists discover that the world they woke up in is fictional. Also, the movie's screenplay was written using YouTube user comments - in the end the characters meet the users that commented.
#TubeClash02 - The Movie
The protagonists have seen the first movie in the series and therefore know what they have to do.
A character comments on how using the name "Narnia" would have violated copyright laws, therefore the land is named "Gnarnia".
Fourth wall broken by one of the psychopaths.
Meet the Spartans
Queen Margo reads a review of "Meet the Spartans" to find out that the movie is just a rip-off from "300". In the next scene, Leonidas reads the graphic novel said movie is based on, possibly to find out what will happen next in the story.
During the song "Shiny" Tamatoa breaks the fourth wall.
In one scene, the protagonist and the antagonist get dizzy from the fast cinematography and tell the camera to stop moving.
The Starving Games
The Samuel L. Jackson lookalike says that he appears at the end of every movie when being asked why he is here (this is the movie's final scene, so indeed "the end of the movie").
The main character's voice over dub is interrupted by another girl doing a voice over, having mistaken the movie for "Gossip Girl".