Ask five marketers how long a video should be and you will get five confident, contradictory answers. The truth is less tidy and more useful: there is no single right length, but there are reliable ranges, and the discipline is matching length to the job, the platform and the intent of the person watching. Here is how we think about it when we plan an edit.
The honest answer: as short as the job allows
Length is not a goal, it is a cost. Every additional second asks the viewer to keep paying attention, so the real question is never how long can we make this, it is how short can this be while still doing its job. A safety induction cannot compress below the content it must legally cover. A feed ad has no such excuse. Start with the job, then cut everything that does not serve it.
Reliable ranges by format
- Social ads: 15 to 30 seconds. One message, fast open, clear call to action.
- Organic social content: 30 to 90 seconds, long enough to deliver value, short enough to hold a feed audience.
- Brand films: 60 to 120 seconds for most, with room to breathe when the story genuinely earns it.
- Corporate overview videos: 90 seconds to 3 minutes, depending on how much the audience needs before they act.
- Case study and testimonial videos: 2 to 3 minutes, enough for a real problem, the work, and the result.
- Training modules: as long as the content demands, but chaptered, several 3 to 7 minute modules beat one 40 minute epic.
- TVCs: fixed by the media buy, 15 and 30 seconds are the standard units in Australia.
Platform changes the maths
The same person tolerates very different lengths depending on where they are. In a social feed, video interrupts, so it must earn every second, and shorter usually wins. On YouTube or your website, the viewer often arrived with intent, they searched, clicked or were sent, so longer content performs because attention was volunteered rather than borrowed. This is why cutting a website film down for the feed works, and why pushing a feed edit onto a landing page can feel thin.
The first five seconds decide the rest
Whatever the total length, the opening carries disproportionate weight. Retention curves on almost any platform show the steepest drop at the start, viewers decide quickly whether to stay. Open with the most interesting true thing you have: the question, the tension, the striking image, the customer mid-story. Logos, title cards and throat-clearing introductions belong at the end, if anywhere. A 3 minute video with a strong first 5 seconds will outperform a 60 second video with a slow one.
When longer wins
Long video is not a mistake, unfocused video is. Considered purchases, complex products, recruitment for hard-to-fill roles, investor communications and training all reward depth, because the audience is small, motivated and worth more per viewer. A 6 minute film watched to the end by exactly the right hundred people can be worth more than a 15 second ad skimmed by fifty thousand. Judge length against who is watching and what a conversion is worth, not against a generic best practice chart.
Do not choose one length, plan a family
The practical resolution to the length debate is that a modern production rarely delivers a single video. The hero film carries the full story on your website, the 30 second cut runs as an ad, the 15 second vertical works the feeds, and each length is built for its context rather than crash-trimmed from the master. Deciding that family of deliverables before the shoot is one of the highest value planning conversations you can have, and it is exactly the kind of thing worth putting in your brief.
Read your own data, then iterate
Generic benchmarks lose to your own analytics every time. Every platform now shows retention or completion for video: where viewers drop, what share reach the call to action, how the same story performs at 30 seconds versus 90. The pattern that emerges after a few posts is your answer, not anyone else's chart. A practical loop looks like this: publish the hero and two lengths of cut-down, compare completion rates rather than raw views, note where the retention curve sags, and cut the next edit with that sag in mind. Two or three cycles teach you more about your audience's appetite than any industry report, and the learning compounds, because each new shoot is planned around lengths you know perform rather than lengths you hope will.
One caution when reading the numbers: completion rate flatters short videos, full completion of six seconds may be worth less than forty percent of three minutes, depending on the job. Read length data against the objective, watch time for awareness, action taken for conversion, and the numbers start telling the truth. Platforms also reward differently, some optimise distribution around watch time, others around early engagement, which is why the same edit can over-perform in one feed and sink in another.
And hold the exceptions loosely. The ranges above are starting points that survive contact with most projects, but a story that genuinely earns four minutes should take four minutes, and a message that fits in six seconds should not be stretched to thirty. Attention follows interest, not duration.
If you are unsure what lengths your project actually needs, tell us about it, we will recommend a deliverable set built around where the video will live and what it has to do.
