A lot of films reach a festival without a trailer, or with one cut in the last week from whatever was left on the drive. Then it goes up on YouTube, Instagram and the festival page, and most people watch a few seconds and keep scrolling.
A trailer has one job: get the viewer to its last frame, the one with the title, the date and where to watch. YouTube editors think about exactly this every day, because YouTube Studio draws it as a line. The audience retention graph shows what share of viewers are still watching at every second of a video. Spend enough time with those graphs and you start cutting differently. Here’s what carries over to trailers.
1. Treat the first five seconds as the whole trailer
On a feed, your opening frames compete with everything else on the screen. A slow fade from black, a distributor logo or a card of laurels gives people a reason to leave before the film has said anything.
Open on the strongest image or line in the film. If there’s one moment people talk about after screenings, that’s your first shot. Then cut away before it resolves, so the viewer stays to find out what happens.
A simple way to find it: before you touch the timeline, write a selects list of the ten best moments in the film, images, lines and sounds, and rank them. The top one opens the trailer. The second-best one closes it.
2. Put the laurels after the hook, not before
Festival selections matter. They tell a viewer that someone they trust has already watched the film and picked it. But a viewer who doesn’t know the film yet won’t stay for a row of laurels.
Let the hook land first. Bring the laurels in around the ten-second mark, over a strong image, for a couple of seconds, and move on. They work much better as proof of something the viewer has just started to care about.
3. Build it in three movements, and cut anything that repeats
Most trailers that hold attention have the same shape:
- Setup: who this is about, where we are and what’s wrong. Keep it as short as the story allows.
- Escalation: the pace picks up, the stakes rise and the cuts get shorter. This is where most of your selects go.
- Button: the title card, then one last moment after it, a line, a look or a sound, that leaves the viewer with a question.
The most common problem in a first cut isn’t a missing scene. It’s a scene that repeats something the viewer already knows. If a shot only confirms information from the shot before, cut it. A tight 90-second trailer beats a loose two-and-a-half-minute one every time.
4. Test it on people, not just on the timeline
You know the film too well to judge whether the trailer makes sense to a stranger. Show it to a few people who haven’t seen the film, and watch them, not the screen. The moment someone glances at their phone is your retention graph.
If you already post on YouTube, put a 30-second cut out as a Short or a teaser before the full trailer, then open its retention graph in YouTube Studio. Dips show you the exact shot where people left. Bumps show you what people rewound, and those moments are your thumbnail and your social cutdowns.
5. Cut a vertical version that works with the sound off
Feeds autoplay without sound. In a 2019 survey by Verizon Media and Publicis Media, 69% of people said they watch video with the sound off in public places. A trailer that relies on dialogue to explain itself is a silent film to most of the people who see it first.
For the vertical cutdown (9:16, 15 to 30 seconds):
- Burn in captions for every line that carries the story, in a size people can read on a phone.
- Put the title on screen early, not only at the end.
- Reframe the shots for vertical. A 16:9 frame letterboxed inside a 9:16 video looks like an afterthought, and it shrinks your best images.
- Keep text and faces away from the bottom and right edges, where the platforms put their buttons and captions.
6. Let the music do the pacing, and clear the rights first
Music is half of a trailer’s pacing, so pick it early and cut to it. One of the strongest tools you have is silence: a hard cut to nothing just before the button makes people look up.
Cut to music you can actually license for marketing use. A trailer built on a temp track you can’t clear will have to be recut, usually the week you need it. Mix so the dialogue stays clear over the music, and for YouTube, master to around -14 LUFS so the trailer doesn’t sound noticeably quieter or louder than whatever played before it.
7. End on one clear next step
The end card should ask for one thing: a screening date and city, a festival page, a release date or a URL. Three different asks means none of them get done. Hold the card long enough to read twice, and put the same information in the video description so nobody has to pause to copy it.
A weekend checklist
If your film doesn’t have a trailer yet, this is enough to cut one over a weekend:
- Write and rank your selects list.
- Open on the best moment and hold the laurels until after it.
- Shape it into setup, escalation and button, and cut every repeat.
- Watch strangers watch it.
- Make a vertical cutdown with burned-in captions.
- Cut to music you’ve cleared.
- Finish on one ask.
A selected film without a trailer is close to invisible to people scrolling a festival program. A trailer people finish does a lot of the marketing for you, long before anyone buys a ticket.
Mark Santos is the founder of Mark Studios, a video production studio in Palm Beach County, Florida. He started editing videos at 10, on his own YouTube channel, and Mark Studios has since completed 8,000+ orders for 4,500+ clients. In February 2025 he rang the NYSE opening bell with Fiverr.
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