Film editing is the process of using time and effort to create the perfect edit. You might wonder what a perfect edit looks like. The key part of making a perfect edit is when the audience does not realize the change in edit because the transitions are smooth and the overall edit flows smoothly.
An example of a poor edit would be when the audio does not match the visuals, such as if a character was speaking but the audio did not match.
The video above demonstrates how to sync audio to video. It is very important to sync audio to video because if it does not, then the audience will find it hard to watch the scene as it not realistic and conveys poor editing.