Video editing involves manipulating video footage to tell a story or convey information in a clear manner. It allows filmmakers to cut out unnecessary parts, rearrange scenes, and add effects like filters. The document discusses several principles and techniques used in video editing. It explains how editing manipulates time, removes/adds elements to shape audience interpretation, and uses techniques like parallel editing, shot reverse shot, match cuts, and transitions to seamlessly flow between scenes. Storytelling, pacing, shot composition, and following rules like the 180-degree line are also discussed. The history of editing from early single-shot films to developments like Kuleshov effect demonstrating the importance of context are covered.