What Makes a Successful Horror Movie?

In approach to making a two minute opening to a Horror, I have done research relating to this specific genre:

This YouTube Video, uploaded by "TheMingThing" shares the knowledge of how to make a Horror Movie in a humorous manner. Beginning with Colour Grading, we are introduced to the concept of "taking the happy out of it" by doing so we decrease the saturation and give a blue/green tint, expressing a darker eerie feel. 

A successful Horror consists of the usual conventions or cliche's, from the location, to the situation. For example, this video shows three teens going back into a school at night, where one is portrayed as the "let's get the hell out of here" wimp, one being the scared of absolutely nothing non believer, and the other just being the reason they're there in the first place. In many cases, we are also introduced to a character who is there as a sign of warning, but no one ever listens to them....

 A build up of Music and sound effects are vital to accomplishing the element of fear in Horror. Unsuspected jumps and loud sounds build up the viewers fear, this creates suspense which leads the audience to be on the edge of their seat. If your horror film focuses on either the undead or spirit kind, it is good to show the use of moving objects and creaking doors. This then leads to the obvious move of disappearing friends and voices sneaking in the bachground. In an attempt to find your friends, you happen to feel followed, this is done by shots that show figures walking past, and a middle shot of the character shocked and looking at their surroundings. This is followed by the confrontation of the ghost, leading to other events along with suspenseful music and sound effects, most likely resulting into a death or escape route.