1. Research on The responsibilities of an editor
Job description
A film or video editor is responsible for assembling raw material into a
finished product suitable for broadcasting. The material they work with
may consist of raw camera footage, dialogue, sound effects, graphics
and special effects. This is a key role in the post-production process
and the editor's skill can determine the quality and delivery of the final
product. The editor may be part of a team and they will usually work
closely with the director to achieve the desired end result.
The majority of film/video editors are employed on a freelance basis,
working on short-term contracts for post-production studios, television
companies and corporate employers. Editors may work on a variety of
productions including feature films, television programmes, music
videos, corporate training videos or advertisements.
Typical work activities
Digital technology, specialist computer software and high-quality
digitisation of sound and pictures have effectively replaced the
traditional manual method of cutting film. Depending on the product, an
editor may be very involved in creating the narrative, structure, and tone
of the programme. In some situations, they may be given creative
freedom while in others they may be needed merely to operate the
machine.
The process of work for an editor involves:
 receiving a brief, and maybe an outline of footage and/or a shot
list, script, or screenplay;
 assembling all raw footage, with camera shots either recorded or
transferred onto video tape in preparation for inputting into the
computer;
 inputting uncut rushes and sound, and synchronising and storing
them into files on the computer;
 digitally cutting the files to determine the sequence of the film and
determining what is usable;
 creating a 'rough cut' of the programme/film and determining the
exact cutting for the next and final stages;
 re-ordering and tweaking the content to ensure the logical
sequencing and smooth running of the film/video.
Additional work activities may include:

2.  overseeing the quality and progress of audio and vision
engineering and editing;
 consulting with the director, producer and/or client throughout the
post-production process;
 familiarising oneself with the style of specific directors;
 experimenting with styles and techniques including the design of
graphic elements;
 selecting the most effective shot of a scene in terms of drama,
story relevance or continuity;
 writing voiceover/commentary;
 suggesting or selecting music;
 if freelancing: negotiating rates of pay and conditions, managing
business affairs, and/or liaising with an agent.
The final stage of the process requires the skills of the online editor,
who is often employed in a specialist post-production facility.
Responsible for delivering the final product to the required
specifications, the online editor's role is focused on technical aspects
such as correcting faulty footage, grading/colouring, and adding special
effects to finish the film or programme. In lower budget productions one
editor may perform both the offline and online editing.
http://ww2.prospects.ac.uk/p/types_of_job/film_video_editor_job_description.jsp