Reaserch into similar products (Dialog in trailers)

in trailers one of the ways you attract the audience is the dialog. alot of trailers in horror contain quite alot of dialog such as the trailers at the bottom of the post. because i am not very confident in the quality of the micraphones in the video cameras we will be using i have decided that my trailer wont be dialog driven. becasue i wont be using dialog to explain the plot i will have to use visual storytelling to make the viewer put the plot together in their head. luckily i have chosen to make a slasher trailer so the plot isnt too complicated as a group of friends get lost on a walk and are hunted by a axe weilding maniac. because my plot is quite simple it will be easy to show the plot through the small pecies of dialog that i will use and the fact that there will be afew hints to what is happening by the close ups of the axe.
the trailer below is for the 2012 horror movie Sinister. throughout the trailer they use dialog to tell the audience the plot such as the voice saying that there was a killing in the house and then the voice of the little girl complaining about that she had to move house. this dialog is used so the audience can get the grasp of what the film is going to be about. the trailer uses an equal amount of visual storytelling as it does dialog storytelling as the dialog explains the start of the story and then the visual comes into play when the farther starts to watch the videos which expands on the plot as it shows that the demon has been killing through the images.