Video is the format almost every platform now favours, which means most businesses eventually decide they need some. The trouble starts at the next question: what kind? “Explainer” and “promo” get used loosely and often interchangeably, but they’re built to do different jobs, and commissioning the wrong one is an expensive way to find that out. This guide sets out what each format actually does, where each falls flat, and how to work out which one your business needs – or whether you need something else entirely.

The Core Difference

The distinction is simpler than the terminology suggests:

• An explainer video answers “how does this work?” – it teaches, clarifies, and removes confusion.
• A promo video answers “why should I care?” – it creates interest, desire, and emotional pull.

Put another way: explainers reduce confusion, promos create desire. If people don’t understand what you do, you have an explainer problem. If they understand perfectly but aren’t moved to act, you have a promo problem. Diagnosing which one you actually have is most of the decision.

Explainer Videos: What They Do

An explainer video takes something complicated and makes it clear. It’s typically calm, structured, and information-led – the goal is understanding rather than excitement.

Explainers work well when

• Your product or service isn’t self-explanatory
• People need to understand a process before they’ll commit
• You’re answering the same questions over and over
• Your offer is genuinely different and needs context
• You’re selling something technical, professional, or unfamiliar

Where they’re typically used

• On a website homepage or key service page
• In onboarding, to reduce support queries
• In sales conversations, to save explaining the same thing repeatedly
• On landing pages where clarity drives conversion

Where they fall short

Explainers rarely stop a scroll. They’re built for someone who’s already interested enough to watch and understand – which makes them poor cold-audience content. Used as a social ad to strangers, an explainer usually gets swiped past before it’s made its point.

Promo Videos: What They Do

A promo video is built to grab attention and make people feel something. It’s shorter, punchier, more visual, and leads with impact rather than information.

Promos work well when

• You need to stop people scrolling
• Your product is visual and sells on how it looks
• You’re launching something and need momentum
• You want people to feel something about your brand
• You’re advertising to people who don’t know you yet

Where they’re typically used

• Social media ads and organic posts
• Website hero sections, for immediate impact
• Launches, events, and campaigns
• Anywhere you’re competing for attention with strangers

Where they fall short

Promos don’t teach. If your offer genuinely needs explaining, a promo will generate interest that then hits confusion – attention won, understanding lost. That’s a frustrating combination, because the video appears to work while the enquiries don’t follow.

Green Flags vs Red Flags

Signs you’re choosing the right format:

How to Choose: A Simple Diagnostic

Ask yourself what’s actually going wrong:

• Do people not understand what you do? → Explainer
• Do people understand but not care? → Promo
• Are you invisible to people who’d want you? → Promo
• Do you repeat the same explanation constantly? → Explainer
• Is your product’s appeal mainly visual? → Promo
• Does your offer need context to make sense? → Explainer

If several point in different directions, that’s a sign you may need both – used in different places rather than one video trying to do both jobs. A video that tries to excite and explain simultaneously usually does neither well.

The Case for Both (In Sequence)

For plenty of businesses the honest answer isn’t either/or – it’s both, in the right order. A promo grabs attention on social and drives people to your site; an explainer then does the work of making them understand and trust what you offer. Attention first, understanding second.

If budget only allows one, choose based on your actual bottleneck. If people aren’t finding you, start with the promo. If they’re finding you but not converting because they don’t quite get it, start with the explainer. And it’s worth noting that video sits within a wider funnel – grabbing attention is only useful if what follows holds up, which we cover in our guide to marketing funnels.

What Makes Either Format Work

Regardless of which you choose, the same principles apply:

• One clear message – videos trying to say five things communicate none
• The right length for where it’ll be seen, not the longest you can afford
• A strong opening – the first seconds decide whether anyone watches on
• Designed to work without sound, since most social video is watched muted
• Consistent with your branding, so it looks like it belongs to your business
• A clear next step, so interest has somewhere to go

That fourth point catches a lot of businesses out. A video whose message depends entirely on the audio loses most of a social audience, so captions and visual clarity aren’t optional extras.

Why Glasgow Businesses Choose LightUpp

Video works best when it’s built for a specific job rather than made because a business felt it should have one. LightUpp produces both explainer and promotional video, and because the same team handles your social media, paid advertising and branding, the video is made to fit where it’ll actually be used – the right format, the right length, and consistent with everything else your audience sees. If what you need is a promo rather than the explainer you asked about, we’ll say so. More on our video work at lightupp.co.uk/promos/.

Frequently Asked Questions

What’s the difference between an explainer and a promo video?

An explainer answers ‘how does this work’ and reduces confusion; a promo answers ‘why should I care’ and creates interest. Explainers teach, promos persuade – and using one where you needed the other is a common and costly mistake.

How long should a business video be?

It depends where it will be seen. Social feed videos need to be short and grab attention within the first seconds, while an explainer on your website can run longer because the viewer is already interested. Match the length to the context rather than aiming for a set duration.

Do I need both types of video?

Many businesses benefit from both used in different places – a promo to win attention and an explainer to build understanding once people arrive. If budget allows only one, choose based on whether your bottleneck is visibility or clarity.

Can one video do both jobs?

Rarely well. A video trying to excite and explain at the same time usually does neither properly, because the two goals pull in opposite directions – one wants pace and impact, the other wants clarity and structure.

Related Reading

To make video work alongside everything else:

• What Is a Marketing Funnel? How Glasgow Businesses Turn Followers into Customers – where each video format fits in the customer journey – https://lightupp.co.uk/what-is-a-marketing-funnel-how-glasgow-businesses-turn-followers-into-customers/
• Instagram vs TikTok vs LinkedIn: Which Platform Is Right for Your Glasgow Business? – choosing where your video will be seen – https://lightupp.co.uk/instagram-vs-tiktok-vs-linkedin-which-platform-is-right-for-your-glasgow-business/
• The Half-Second Test: Why Branding Decides Whether Glasgow Customers Notice You – why your video needs to look like the rest of your brand – https://lightupp.co.uk/the-half-second-test-why-branding-decides-whether-glasgow-customers-notice-you/

Not sure which video your business needs? We’ll help you work it out → lightupp.co.uk/promos/