The fundamentals of editing

1. Continuity editing is the process, in film and video creation, of
combining more-or-less related shots, or different
components cut from a single shot, into a sequence to direct
the viewer's attention to a pre-existing consistency of
story across both time and physical location.
Some examples of continuity errors include:
Objects suddenly going missing from the scene between shots.
An actor's hair or makeup changing between shots.
Pieces of film equipment appearing in a shot.

2. Non-continuity editing is when shots are mismatched to disrupt the
impression of time and space. This draws the audiences' attention to
the process of cutting and disturbs the illusion of 'reality'. An example
is the use of flash backs.

3. Cutting Techniques
The Wipe
Hard Cut. Your most standard type of cut is the hard cut
Cross-Cut. Cross-cutting is the next basic type of cut after hard
cutting
Jump Cut
Cutaway
Match Cut
Contrast Cut
Parallel Editing Cut
J and L Cuts

4. Common techniques of continuity editing
Continuity editing can be divided into two categories: temporal continuity and spatial continuity. Within each category,
specific techniques will work against a sense of continuity. In other words, techniques can cause a passage to be
continuous, giving the viewer a concrete physical narration to follow, or discontinuous, causing viewer disorientation,
pondering, or even subliminal interpretation or reaction, as in the montage style.