Editing a video teaches you that what you leave out matters as much as what you put in.

Absence shapes a piece as much as presence does. Cutting teaches that faster than anything else, because you watch a scene improve when something leaves and realise an audience never misses what they never saw. Everything you include competes for attention with everything else you include. Omission is a positive act rather than a failure to supply.

Remove a tenth of something you have made, choosing deliberately what goes. Watch or read both versions back to back. Notice whether anything you cut was actually missed.