How to edit a video: a complete guide for beginners

What do you need to start editing videos?

Less than most beginners think: a computer, an editor, your footage and a pair of headphones, because speakers hide the hum, clicks and breaths that headphones reveal.

For Sharpy, the computer is a Mac with Apple silicon (M4 or later), 16 GB of memory and macOS 26 or later. Every model runs on that Mac, so your footage never leaves it and nothing is metered: one plan, $20 a month or $200 a year at launch. To learn on a free editor first, the best video editing software for Mac lists the free ones.

How do you edit a video, step by step?

Every edit, from a 30-second reel to a two-hour podcast, goes through the same ten steps, in this order: there is no point grading a shot you are about to cut.

Step	What good looks like	What Sharpy does
1. Plan	One sentence says what the video is for	Takes your brief or a reference video, and asks for the length
2. Gather	Every file found, synced, in one place	Joins clips into one recording and syncs sound by what both microphones heard
3. Log	You know where the good moments are	Reads every word, pause and shot; favourites and subclips go in bins
4. Assemble	The best take of each line, in story order	Picks the best take across every recording and builds the structure
5. Cut	No stumbles or dead air, breaths kept	Cuts fillers, restarts and retakes; shortens stops to the speaker's own pauses
6. B-roll	Pictures where the words need showing	Lays cutaways from licensed libraries over the voice
7. Captions	Right word for word, readable anywhere	Two speech engines vote on the words; captions keep off faces
8. Sound	A clear, steady voice, music under it	Cleans and levels the voice, ducks the music, fills gaps with room tone
9. Colour	Shots that match, true skin	Matches shots and grades the room around the person
10. Export	The right shape, codec and loudness	One destination sets all three; every render is checked

Your first edit in Sharpy walks through these steps on one recording, and the lessons teach each tool in turn.

How do you plan and gather footage before you edit?

Plan first. Decide what the video is for, who will watch it, where, and for how long. A 60-second vertical reel needs its hook in the first seconds and quick changes of picture; a 20-minute YouTube explainer needs a clear order and room to breathe. If there is a video you want yours to feel like, keep it as a reference.

In Sharpy you say what you are making in plain words. It writes the brief, asks at most one question, and asks you for the length rather than inventing one. It never guesses the shape or quality of the finished video either: you give a size, a ratio such as 9:16 or a destination, and every later render follows it. Give it a reference and it reads that video's structure, pacing and dressing; editing in the style of a video you love is that lesson.

Top-down view of a wooden desk in morning light: a woman's hands lay out memory cards, a phone and a small audio recorder beside a notebook of pencil storyboard sketches. — Plan on paper and gather every card and recorder in one place before the first cut, so nothing turns up halfway through.

Gather everything. Copy every card into one folder per project, keep the originals untouched, sync any sound recorded separately and put phone clips in shooting order. Sharpy joins a vlog's fourteen clips into one recording with one transcript, still knowing which card each moment came from, lines up a recorder's sound with a camera's by what both heard, and never writes over an original.

Log before you cut. Watch everything once and mark the good moments. In Sharpy a stretch of a file can be a favourite, a reject or a named subclip with keywords, filed in bins, and Sharpy reads every recording itself: every word, who speaks when and what is on screen. Press ⌘F and type what was said to jump straight to it.

How do you cut a video so it holds attention?

Assemble. Put every usable piece in story order, a little long, with the strongest line at the top, then choose the best take of each line. Sharpy reads every attempt at every line, across every recording, and chooses the best combination for the whole piece, not only the best reading of each line. It never cuts on a blink: on its maker's 34-line reel, all 33 joins landed on an open eye.

Cut. Take out stumbles, false starts, repeats and the "um" that breaks a sentence, and shorten long pauses without removing every one. Cut between thoughts rather than inside them, and hide a jump cut with a change of framing: a 15 to 25% size change across the cut reads as a second camera.

Sharpy's review list deals with each kind of slip as an editor would:

Fillers such as um and erm are cut; "mm-hmm" stays, because it means yes.
Filler phrases such as "you know" are left for you to check.
Repeats, restarts and retakes keep the version the speaker meant.
Long stops shrink to the speaker's own quickest pause at that kind of place, never to nothing, and a pause for emphasis or a reveal is left alone.

Every cut goes into an edit decision list with its reason, and a decision with no reason does not render. Removing filler words and dead air on a Mac goes deeper, and the cutting topic gathers every guide to pacing.

Add B-roll. Show what the words describe and cover the jumps. In Sharpy a cutaway changes only the picture: the voice and captions carry on untouched. One search covers music, sound effects and stock video from licensed sources such as Incompetech, Scott Buckley, Mixkit, the Internet Archive, Freesound, Wikimedia Commons, Pexels, Pixabay and NASA, each result with its licence and the credit it owes. Stock clips come at least as big as your piece, so B-roll is never enlarged, and each one's colour can be matched to your recording. The credits go in a file beside the render, ready for the description, never onto the picture. What B-roll is has more.

How do you add captions, sound, colour and graphics?

Captions must be right word for word, on time and readable. Netflix's English timed text guide, for example, allows adults up to 20 characters a second, on at most two lines of 42 characters. In Sharpy two speech engines vote on every word in 25 European languages, and your script corrects the spelling of a name but never adds a word you did not say. Its 22 caption styles highlight the word being said, keep off faces, and get a heavier backing wherever the picture would drop them below the 3:1 contrast WCAG asks of large text. Caption files come out as .srt and .vtt, checked against Netflix's, Prime Video's or the BBC's rules. See the captions topic.

Sound matters as much as picture: viewers forgive a soft shot sooner than a voice they cannot follow. European broadcast follows EBU R128 at −23 LUFS, and streaming masters are usually louder. Sharpy's voice clean-up lets only a setting that keeps 97% of the words win. It levels each clip's dialogue to −23 LUFS, rides music 6 dB down under every line, fills the holes cuts leave with the room's own sound, and its streaming destinations aim at −14 LUFS, measured on the finished file. See the sound topic.

Colour comes in two passes: correct first (exposure, white balance, shots that match), then grade for a mood, trusting the scopes over your eyes. Sharpy has the four scopes colourists use, 12 grading instruments and .cube LUTs. It matches one shot to another as a viewer sees each, and lays a mood around the person rather than over them: on its maker's footage, skin moved by no more than 0.03 on a scale where 1 is the smallest difference a person can see. See the colour topic.

Graphics name people and places; keep them inside the title-safe area and up long enough to read. Sharpy has templates such as lower thirds and title cards, and designer-made motion graphics filled with your words in your brand kit's colours. It refuses to place words behind a person or under 3:1 contrast, and offers a place where they read. Between shots there are 141 transitions. See the graphics topic.

How do you export a finished video?

Choose the shape (16:9 for YouTube, 9:16 for Shorts, Reels and TikTok), the codec (H.264 to upload, HEVC for smaller files, ProRes for a master) and the loudness together. In Sharpy one destination sets all three: vertical, vertical-master, square, portrait, widescreen, widescreen-4k, broadcast or master, so a vertical cut cannot go out at 1920×1080. Tick the captions box for .srt and .vtt files, and chapters go into the file and, where YouTube's rules allow, into the description as timestamps.

Every render passes 19 standard checks: a cut inside a spoken word blocks it, and text outside the title-safe area raises a warning. To finish elsewhere, Sharpy hands the edit to Final Cut Pro or DaVinci Resolve as FCPXML, and to Premiere Pro as a CMX 3600 EDL or OpenTimelineIO. See the export topic.

How long does it take to edit a video?

It depends on how much footage you have and how much the edit does: trimming a short clip by hand takes minutes, a polished YouTube video made by hand often takes hours, and most of that goes on watching, logging and choosing.

Measured on the base Mac mini M4 with 16 GB, Sharpy watches footage 1.7 times faster than real time, makes a transcript in 4.9 minutes for every hour of sound, and renders a 1080×1920 timeline at 903 frames a second. It handles recordings of up to four hours, so what is left for you is reading its decisions.

Frequently asked questions

How do I edit an existing video?

Open it in an editor, cut what you do not need and export a new file, keeping the original. Sharpy reads any finished video and reports what it is, what is worth doing and its problems, such as a true peak above the −1 dBTP ceiling, and it can caption a video somebody else cut.

What is the easiest way to edit videos?

Let software make the first cut and spend your time checking it. Sharpy makes the whole edit from a recording and a sentence about what you want, with a reason for every cut, so you review decisions instead of making each one.

How do you edit YouTube videos?

Cut the opening down to the hook, keep the pace tight without losing the speaker's rhythm, add B-roll and captions, and export 16:9 with chapters. The formats topic has a guide for each kind of video, from talking heads to podcasts.

What are the best video editing tips for beginners?

Cut between thoughts, not inside them; keep the breath before a new sentence; change the framing at a jump cut; and listen on headphones before you export. A line that repeats a point already made can go.

Do I need a powerful computer to edit video?

Not for most video. Sharpy needs a Mac with Apple silicon (M4 or later) and 16 GB of memory, and its speeds were measured on the base Mac mini M4.

Sources

Checked on 18 October 2026.