The short answer
- There's no fixed rule. A longer VSL is fine as long as every minute adds something (AWAI).
- The bigger the decision, the longer it usually is. Higher price, more doubt and less familiarity call for more explanation and proof.
- Your viewing data decides. Where viewers drop off en masse, there's a problem, whatever the length of the video.
Why there's no standard length
A VSL has to take your viewer from "I recognise this" to "I want this". How many steps lie in between differs per offer. Someone considering a simple product costing a few dozen needs little: a recognisable problem, a clear solution, some proof. Someone spending thousands on a programme wants to know who you are, how it works, what others achieved with it and what happens if it disappoints.
That's why advice like "a VSL should be under five minutes" or "long VSLs always work better" are both too simple. Either can be right for one offer and fatal for another.
Five factors that set the length
- The price and impact of the decision. The more is at stake for the buyer, the more trust is needed.
- How much your viewer already knows. Someone who doesn't yet recognise the problem needs more build-up than someone already comparing solutions.
- Cold or warm traffic. People who don't know your brand yet are better served by a shorter entry; people who already follow you watch longer.
- The complexity of your offer. A new mechanism or an unusual approach needs explaining.
- The objections you need to remove. Every common doubt you don't address becomes a reason not to buy.
Signs your VSL is too long
- An early, steep drop in your retention curve. If many people leave in the first minute, it's usually the opening, not the total length.
- A "valley" in the middle. A section where viewers leave en masse is often repetition, too long a run-up or a story without tension.
- Few people reach the offer. If almost nobody gets to the moment you make your offer, you're selling to almost nobody.
Signs your VSL is too short
- The same questions in comments, emails or sales calls. What people still ask after watching should have been in the video.
- Viewers reach the end, but don't buy. The attention was there, but the trust or conviction wasn't.
- A lot of hesitation at the price. If value hasn't been built clearly before the price arrives, any price feels too high.
How to approach it
- Start with the content, not the clock. List what your viewer needs to know and believe to buy. That sets the length.
- Make the opening rock solid. The first seconds decide whether someone keeps watching. They need to work without sound too, because browsers only autoplay videos muted.
- Cut what adds nothing. Every sentence should bring the viewer closer to the decision. Remove repetition and filler.
- Look at your retention curve. Most video platforms show where viewers drop off. Improve exactly those sections.
- Make short versions for ads. Your long VSL on the page and short cutdowns from the strongest parts in your ads: that way you reach cold viewers and convince warm ones.
A typical example (for illustration)
A composite example, not a specific client case.
A coach has an eighteen-minute VSL. The retention curve shows that a large share of viewers drop off during a long personal story after the opening. They cut that section down to its essence and move the customer proof forward. The video gets a few minutes shorter, but more importantly: many more viewers reach the moment the offer arrives.
Length is a result, not a goal
The question "how long should a VSL be?" is really the question "what does my viewer need to hear to say yes?". Answer that first, with real research into your customer, and the length follows. Still unsure which format fits at all? Read VSL vs sales page vs webinar. Or see how we write VSLs.