How-to Guide: Optimising Video for Mobile and Social Platforms

Master mobile and social video with our expert guide. Learn how to hook viewers in 3 seconds, choose the right format, and boost engagement with captions. Essential reading for digital marketers.


The Essential Guide to Optimising Video for Mobile & Social

Video isn’t one size fits all anymore. Different platforms Instagram, TikTok, YouTube, each have unique audience behaviours and technical requirements. A format that thrives in one feed will falter in another. To capture attention and drive engagement, your strategy must be platform-native.

Here’s our essential guide on how to produce video content that performs, whether it’s a 9-second Instagram Story or a 60-second website hero clip.

1. The First 3 Seconds: Your Non-Negotiable Hook

On mobile, the choice to scroll away is made in an instant. Your opening is your most critical creative asset.

  • Lead with Value or Intrigue: Immediately answer “What’s in it for me?” Show the end result, ask a provocative question, or use text overlay to state a compelling benefit.
  • Prioritise Visual Dynamism: Use bold movement, a striking close-up, or unexpected visuals. Static openings lose.
  • Ditch the Slow Burn: Brand intros and lengthy titles must go after the hook, not before. Start in media res, in the middle of the action.

2. Aspect Ratio & Format: The Technical Foundation

Getting the canvas right is the first step to a professional, platform-optimised feel.

PlatformRecommended Aspect RatioKey Considerations
Instagram Reels/TikTok9:16 (Full-Screen Vertical)Design for sound off but amazing with sound on. Ensure the story is clear visually. Use on-screen text and graphics that work within a vertical frame.
Instagram Feed & Stories4:5 (Portrait) or 9:164:5 occupies more screen real estate in the feed than square (1:1). Use 9:16 for immersive Stories.
YouTube (Shorts)9:16 (Vertical)Similar to Reels, but YouTube’s audience may expect slightly higher production value. Hook is equally critical.
YouTube (Traditional)16:9 (Landscape)The standard for longer-form content. Ensure key info and subjects are within the “safe area”—a central 4:5 zone—as many viewers may watch on mobile in a vertical, cropped view.
LinkedIn & Facebook1:1 (Square) or 4:5Square and 4:5 formats perform well in the busy LinkedIn/News Feed environment. They are more immersive than 16:9 and don’t require full-screen engagement.

3. Captioning & Engagement: Beyond the Visual

Accessibility drives broader engagement. Subtitles are no longer optional; they are a key performance tool.

  • Always Use Captions: Over 80% of social video is watched without sound. Burned-in, clear subtitles ensure your message is received. Use a clean, legible font.
  • Treat Text as a Creative Element: On-screen text should emphasise key points, reinforce branding, and add rhythm. Sync text appearance with audio beats.
  • Direct Engagement: Use clear, platform-native calls-to-action. Ask a question in the caption, use the poll sticker in Stories, or encourage users to “comment with their take.”

4. Final Technical Optimisation Checklist

Before you publish, run through this list:

  • File Format: Use .MP4 or .MOV with H.264 codec for universal compatibility.
  • File Size & Resolution: Aim for the highest quality within platform limits. For social, 1080p is typically sufficient. For website heroes, use 4K if possible.
  • Colour Profile: For social, always export in sRGB. Rec. 709 colour space can appear desaturated on mobile screens.
  • Thumbnail: On platforms like YouTube and LinkedIn, your custom thumbnail is as important as the video itself. Design a clear, high-contrast image with readable text.

Why This Works: Mastering the Digital Landscape

By treating each platform with intention, you respect the user’s experience and dramatically increase your content’s potential reach and impact. This isn’t just about technical specs, it’s about speaking the native language of each digital community.

At Soho Pixels, we bake these principles into every video we produce, ensuring your content doesn’t just exist online, but thrives there.

Need expert help crafting platform-perfect video?
Get in touch with our team to elevate your social and mobile video strategy.

Why Your Brand is Losing Attention in the First 3 Seconds (And How to Fix It)

Attention is the most valuable currency in modern media, and it’s depreciating faster than ever. On social platforms and digital feeds, viewers make a subconscious decision to stay or scroll in under three seconds. The stark reality is that most brands lose that battle before their core message even begins.

The issue, however, isn’t audience behaviour. It’s creative intent.

The issue, however, isn’t audience behaviour. It’s creative intent.

Too many campaigns still open with slow logo animations, atmospheric slow builds, or vague, abstract visuals that assume a level of patience audiences simply no longer possess. Today, viewers don’t wait for a payoff, they react instantly. At Soho Pixels, we design every piece of content with the opening moment as the strategic anchor of the entire piece, not a polite preamble.

The Three Common Pitfalls (And What to Do Instead)

If your content is haemorrhaging attention, it’s likely falling into one of these traps in the critical opening frames.

1. The Slow Reveal vs. Immediate Relevance

  • The Pitfall: Opening with a wide, establishing shot of an empty office or a slow pan across a landscape. The viewer is left asking, “What is this, and is it for me?”
  • The Fix: Signal Immediate Relevance. Your first visual or line of text must instantly answer the viewer’s subconscious question: “Is this for someone like me?” Show the subject’s face, the product in use, or use bold text overlay that names the audience or their problem directly. Example: Instead of a wide shot of a gym, open on a close-up of sweaty, determined hands on a barbell.

2. Polished Generality vs. Emotional Disruption

  • The Pitfall: Relying on glossy, generic stock-style imagery that blends into the feed. It’s professional but forgettable.
  • The Fix: Create an Emotional or Visual Disruption. A pattern break is more arresting than polish. This could be an unexpected visual (a surprising use of colour), a raw human moment (a genuine laugh), or a provocative question in text or voiceover. The goal is to trigger a micro-jolt of curiosity or recognition.

3. Atmospheric Ambiguity vs. Clarity of Tone

  • The Pitfall: Using ambiguous, moody visuals or cryptic copy that leaves the viewer confused about the emotional tone. Is this an inspirational piece? A funny one? A serious tutorial?
  • The Fix: Establish Clarity of Tone Instantly. Confusion kills retention faster than lower production value. Use music, facial expression, colour grade, and copy to establish the genre within the first second. A quick, upbeat sonic logo and a smile signal fun. A stark, silent title card signals serious drama.

Our Three-Framework Fix for the First Three Seconds

We structure these openings not as gimmicks, but as a disciplined creative framework.

  1. The “In Media Res” Opening: Start in the middle of the action. Begin with the most compelling moment of the story—the hands struggling with the knot, the chef tasting the dish, the sigh of relief—then loop back to explain how you got there.
  2. The “Text-First” Hook: Use bold, succinct text overlay as your primary hook. State a surprising statistic, ask a blunt question, or present a contrarian opinion. The eye is drawn to readable words, making this a failsafe for silent autoplay.
  3. The “Human-First” Close-Up: Lead with an expressive human face. Our brains are hardwired to focus on faces, especially those conveying relatable emotion, determination, surprise, joy. It creates an instant, subconscious connection.

Fixing the first three seconds isn’t about chasing viral gimmicks. It’s a fundamental sign of respect for your audience’s time and attention. It means designing for how people actually consume content today: with speed, selectivity, and an emotional filter.

Are your first three seconds working for you or against you?
Let Soho Pixels audit your content and craft hooks that hold attention.

How to Know When Your Brand Is Ready for Video (And When It’s Not)

Is video the right next step for your brand? We share the three foundational questions to ask before investing, ensuring your video amplifies clarity, not confusion.

Video is often seen as the ultimate proof point of a modern brand, a signal that you’ve arrived, that you’re dynamic, that you’re ready to connect. But launching into production without the right foundations is a costly mistake.

Here’s the essential truth: video is an amplifier. It doesn’t create your brand message or audience understanding; it magnifies whatever already exists. That means it can spectacularly amplify clarity, personality, and value. But it can just as powerfully amplify confusion, inconsistency, and strategic gaps.

Before you allocate budget and creative energy, ask yourself these three non-negotiable questions. Your honest answers will tell you if you’re ready for a powerful tool, or if you need to lay more groundwork first.

1. Is Our Core Message Crystal Clear?

Video is a narrative medium. If you can’t succinctly articulate who you are, what you do, and why it matters in a single sentence, a video will struggle to communicate it.

  • You’re NOT ready if: Your value proposition is still vague or you’re trying to say everything to everyone. A video that attempts to cover multiple, complex messages will feel scattered and forgettable.
  • You ARE ready if: You have a sharp, focused core message, a “North Star” that guides all your communications. You can clearly state the one thing you want the viewer to think, feel, or remember.

2. Do We Truly Understand Our Audience?

Great video speaks to someone, not at everyone. It uses their language, taps into their motivations, and appears in the spaces they trust.

  • You’re NOT ready if: Your audience definition is broad demographics (e.g., “women 25-40”). You don’t know their specific pain points, what media they consume, or what tone of voice resonates with them.
  • You ARE ready if: You have detailed audience personas. You understand their psychographics, their aspirations, frustrations, and sense of humour. You know where they spend time online and what kind of content they choose to engage with.

3. Do We Know Where This Content Will Live and What It Must Do?

A video without a strategic home is a ship without a port. Its format, length, and style are dictated by its destination and purpose.

  • You’re NOT ready if: The goal is simply “to have a video.” You haven’t defined if it’s for top-of-funnel awareness on social media, mid-funnel explanation on your website, or bottom-of-funnel conversion in an email.
  • You ARE ready if: You have a clear channel and role for the asset. You know if it’s a 15-second TikTok hook, a 2-minute website explainer, or a 30-second YouTube ad. You’ve defined the specific action it should drive (brand recall, website visit, sign-up).

The Cost of Getting It Wrong vs. The Power of Getting It Right

Investing in video without these foundations creates expensive noise. It’s content that fails to connect, confuses potential customers, and drains resources that could be used to solidify your brand basics.

When these pillars are firmly in place, however, video becomes one of your most potent assets. It can:

  • Humanise your brand with authentic storytelling.
  • Simplify complex ideas with visual demonstration.
  • Build emotional equity faster than any other medium.
  • Drive measurable action with compelling calls-to-action.

The decision isn’t if you should use video, but when. By doing the strategic work first, you ensure that when you press record, you’re amplifying a message that is clear, targeted, and destined for impact.

Unsure if your foundations are solid, or ready to amplify a clear message?
Soho Pixels can help you audit your readiness or craft your first strategic video.