RESPONSIBILITIES: • As a film/video editor, you'll manage material such as camera footage, dialogue, sound effects, graphics, and special effects to produce short video films for marketing and training material.  

all vedio and audio effects and add music and video  

Video editing is the process of manipulating and rearranging video shots to create a new work. Editing is usually considered to be one part of the post production process — other post-production tasks include titling, colour correction, sound mixing, etc.