Viral video marketing is the practice of making videos designed to be shared, so that each viewer passes them on to more people and your reach grows far beyond your own followers. Nobody can promise you a viral video. What you can do is stack the odds: grab attention in the first few seconds, make something people want to send to a friend, and post it in a way the platforms are likely to push.

This guide is about those odds. We cover what actually makes viral videos spread, how to structure a short video so people keep watching, the role of captions and sound, and how to measure whether your videos are becoming more shareable over time, even if none of them hits a million views.

A viral video can’t be guaranteed, but shareability can be built

Any agency or freelancer who guarantees a viral video is guessing. The algorithms on TikTok, Instagram and YouTube test each video with a small group first, then show it to more people if they watch, engage and share. Timing, luck and what else is trending that day all play a part.

The good news is that the things that help a video go viral are the same things that make it perform well with a normal audience. So rather than chasing one huge hit, we aim for a steady stream of videos that people watch to the end and pass on. Over time, that’s what grows an account and, more importantly, brings in enquiries.

It’s also worth asking whether you need viral reach at all. A plumber in Guildford doesn’t need two million views from across the world. Ten thousand views from people within 20 miles is worth far more. Shareability matters most when it spreads among the right people.

People share videos that say something about them

When someone sends your video to a friend, they’re really saying “this made me think of you” or “this is so us”. Most shared videos tap into one of these reasons:

• It’s useful. A clever tip, a shortcut or a “things I wish I’d known” list. People save these and send them on.
• It’s relatable. A moment that sums up a job, a hobby or a type of customer perfectly. “Every hairdresser on a Saturday” type content travels well within that group.
• It’s surprising. A reveal, a before and after or something unexpected happening.
• It’s funny. Humour is one of the most shared emotions, but only if it fits your brand.
• It’s emotional or meaningful. A story that makes people proud, moved or keen to support a cause.
• It invites people in. Challenges, trends and duets give viewers a reason to join in rather than just watch.

The ALS Ice Bucket Challenge in 2014 is still the best-known example of that last point. It worked because taking part was easy, it was fun to watch, and every video nominated more people. The Dollar Shave Club launch video from 2012 is the classic example of the “funny and surprising” route: a founder talking straight to camera with a sense of humour that matched the brand. Neither of these could have been planned to go as far as they did, but both had a built-in reason to share.

Related reading: Instagram Reels for Small Business: A Simple Guide to Getting Started

The first three seconds decide whether anyone watches

On every short-form platform, people decide almost instantly whether to keep watching or scroll on. Your opening has one job: give them a reason to stay. That’s what we mean by a hook.

Hooks that work for businesses

• Lead with the result. Show the finished kitchen, the transformed garden or the plated dish first, then show how you got there.
• Name the viewer. “If you run a small business in Surrey, watch this” tells the right people this video is for them.
• Make a bold but honest claim. “This is the most common mistake we see on new websites” works if you then deliver.
• Start mid-action. Skip the intro. Begin with movement, a voice or something happening on screen.
• Ask a question people want answered. Then answer it before the end, or they’ll feel tricked.

Put text on screen in the first second that backs up the hook. Plenty of people decide from the words before they’ve heard anything. And cut ruthlessly. If a line doesn’t move the video forward, take it out.

Captions and sound need to work together

A lot of people scroll with the sound off, especially at work or on public transport. Others scroll with the sound on and will swipe away from silence. Good viral videos work either way.

• Add captions to every talking video. Most platforms and editing apps generate them automatically. Always check them for mistakes, particularly names and place names.
• Keep captions inside the safe zone. Buttons, usernames and descriptions cover the bottom and right edges of the screen, so keep text towards the middle.
• Use sound with purpose. Trending sounds can help a video get discovered, but business accounts should stick to audio cleared for commercial use, such as each platform’s commercial sound library.
• Get the voice clear. A cheap clip-on microphone usually makes a bigger difference than a better camera.

Some formats are easier to share than others

Short vertical video (Reels, TikTok and YouTube Shorts) is where most shares happen now, because it’s quick to watch and easy to send in a message. Formats that tend to travel well for businesses include:

• Before and after: renovations, makeovers, cleaning, landscaping, restorations.
• Process videos: how something is made, packed or fixed, often sped up.
• Myth busting: “three things people get wrong about…” in your area of expertise.
• Behind the scenes: the team, the office dog, the chaos of a busy day.
• Answering a comment: replying to a real customer question with a video.
• Trends with a twist: a popular format adapted to your industry, posted while it’s still fresh.

Keep each video to one idea. If you’ve got three tips, consider three videos. Watch time matters, and a tight 20-second video watched to the end often beats a rambling minute.

Posting well gives every video a better chance

The platforms tell us a fair amount about what they reward. Instagram’s head, Adam Mosseri, has said that the top three signals for ranking are watch time, likes and sends (shares through direct messages). That’s a useful reminder that a share in a private chat counts for a lot.

• Post when your audience is online. Check your insights for the hours your followers are most active, then test around them.
• Write a caption that adds something. A line of context, a question or a prompt like “send this to someone who needs it” can nudge shares.
• Reply to comments early. Conversation in the first hour or so shows the platform people care.
• Test with new audiences. Instagram’s trial reels let professional accounts show a Reel to non-followers first, which is a low-risk way to test a new idea.
• Be consistent. One video a month won’t give you enough data to learn from. A regular rhythm will.

Repurposing stretches every video further

A video that works once usually works again. We plan content so one shoot gives a client several pieces:

1. Film one longer piece, such as a walkthrough or interview.
2. Cut three to five short clips, each with its own hook.
3. Post the strongest clip across Reels, TikTok and Shorts, adjusting the caption for each platform.
4. Pull a still or quote for a carousel or LinkedIn post.
5. If a clip performs well organically, consider putting a small ad budget behind it to reach more of the right people.

Avoid reposting videos with another platform’s watermark on them. Export a clean version from your editing app instead.

Measure shareability, not just views

Views are nice, but they don’t tell you whether people valued the video. When we review video performance for clients, we look at:

• Shares and sends: the clearest sign a video is spreadable.
• Saves: people want to come back to it, which usually means it was useful.
• Average watch time and completion rate: how much of the video people actually watched.
• Reach from non-followers: how far the video travelled beyond your existing audience.
• Profile visits, follows and link clicks: whether viewers wanted more of you.
• Enquiries: the number that pays the bills. Ask new customers where they found you.

Compare each video against your own average rather than against someone else’s viral hit. If shares and completion rates trend upwards over a few months, your videos are becoming more shareable, and that’s when bigger moments become more likely. If you’d like help planning or filming that kind of content, our video production service is built for exactly this.

Frequently asked questions

Can you guarantee a video will go viral?

No. Platforms test each video with small audiences before showing it more widely, and timing and luck play a part. You can improve the odds with strong hooks, clear sound and captions, and content people want to share.

How long should a viral video be?

There’s no perfect length. Many shared videos are under a minute, but what matters is whether people watch to the end. Make it as short as the idea allows.

Should businesses use trending sounds?

Only audio cleared for commercial use. Business accounts on TikTok and Instagram have access to commercial sound libraries, which are the safer choice for brands.

What counts as viral for a small business?

For a local business, a video that reaches several times your usual audience, mostly in your area, and leads to new enquiries is a big win, even if the total views are modest.

Make your videos easier to share

Delivered Social plans, films and edits short-form video for SMEs across Surrey, Hampshire and West Sussex, then posts and reports on it as part of our social media management. Take a look at our video services, or contact the team to talk about the videos your customers would actually share.