3.purposes

Storytelling
Editing can be used in many different way and is used for alot of different purposes, one of the purposes of editing is storytelling. A good piece of editing means you have a good piece of footage. It doesn't matter what kind of sequence it is any sequence has to be able to tell a story to be able to engage and entertain the audience, after all the audience are the people you are trying to please with your work so they need to be able to get drawn into the story.

 To be able to do that the story needs to be told well, which the first step is editing. The editing is one of the most important things with storytelling because if the footage isn't pieced together so it flows smoothly then the audience may lose interest.

Like with the film The notebook it tells the story of Ally and Noah from the day they first met to the end. going back and fourth from the memories to the present time. The scenes flow well and keep the audience hooked on the story of the two lovers.

One of my own examples is my Saving Scarlett video because its following the story of Scarlett and her sister who she cant see helping her through life up to how Scarlett finds out who she is.

Another one of my own examples is the Stop bullying video because it follows the story of the main character as she is being bullied up to the point where she see gets help.

Combining shots into sequences
Combining shots into sequences is all part of the process of bringing all the shot filmed and making them flow into one. When all of them should have been edited on there own then they can be placed together to form a sequence.
A successful edit means that the sequence will look good but to ensure that it looks good the editing need to look none existent. So then it is not visible to the audience, which makes it look like one long sequence instead of separate shots.

This is not just done in films music videos do this as well combining different shot and bringing them together so that the artist is still miming the lyrics to the time of the music but in different locations.

For example in one direction's cover of One Way or Another they are in ghana, london, new york, in there hotel and an airport but because the shots have been cut and pieced together to stay in time with the music One Direction are still miming to the right timing of the music.

I do the same in my version of One Direction's One Way or Another video i am in different locations but still miming in time with the music because i have cut it and brought the shots together to make a sequence.

Creating pace
Creating pace is where editing is used to either speed up or slow down a film. the pacing can alter the way the audience views the film. Like in action films  they are usually fast paced the pacing is done in the editing the shots so they are shorter and quickly cut to a different shot. 
Whereas drama films are normally slow paced and in the edit use slower and longer shots to allow the audience to see and understand the scene, so then they can understand the character better. 

Here's an example of a fast paced scene from one of the Fast and Furious films where during the race the shots are cut to different views and at fairly fast cuts and also speed up clips to show the fast pacing of the race.

Then there's the scene from The Hunger games where the name of the female that will represent district 12 in the games the scenes are slow and quiet from the point of the name getting going to be getting picked out until Prim's name is read out this keeps the tension building for the audience as they wounder who is it going to be.

My own example for creating pace is in my Monster music video where it starts of slow paced but near the end it builds up to faster cuts to give that feeling that something is going to happen.