Latest / Video Marketing with Fexingo: Short Form, Long Form, and Video-First Strategy / Why Video Marketers Should Test Silent Captioned Ads
Transcript
- Lucas: So you're scrolling through Instagram — or LinkedIn, or TikTok — and a video starts playing. You're in a coffee shop, or on the train, or just don't want to disturb anyone. So the sound stays off. Luna: That's me, basically every time. I think I've watched maybe five videos with sound in the past month. Lucas: Right, and the data backs that up. According to a 2025 study from Verizon Media, 92 percent of mobile viewers watch video with the sound off. Yet most brands still produce video as if everyone's sitting in a quiet room with headphones on. That's a disconnect. Luna: So today's angle: why you should test a silent, captioned version of your next video ad — on purpose, not as an afterthought. Lucas: Exactly. And I want to start with a specific case. A B2B SaaS company called Loomly — they do social media scheduling — ran an A/B test on a thirty-second product demo ad. The control had voiceover narration and background music. The variant had the same visuals but zero audio, with animated captions timed to the visuals. Luna: What did they find? Lucas: The silent version had a 34 percent higher video completion rate and a 21 percent higher click-through rate. That's not a tiny bump. And it's not an outlier — I've seen similar results from brands in e-commerce, education, even a car manufacturer testing silent walkaround videos. Luna: So why does it work? I mean, intuitively it makes sense — people are scrolling, they don't want to commit to audio. But what's the psychological hook? Lucas: I think it's about cognitive load. When you're watching with sound off, your brain is only processing visual information. The captions become the primary information channel, but they're also a pacing tool — they force the viewer to stay at the video's rhythm. There's no temptation to skip ahead or multitask because you're reading along. Luna: That's interesting — so captions aren't just accessibility, they're actually a retention mechanism. Lucas: Absolutely. And this is something that often comes up in conversations with our listeners — people who are putting real effort into improving their video marketing, testing new formats, and learning from data like this. If these kinds of practical insights are useful to you, I'll just mention, there's a way to support the show and keep it ad-free. It's buy me a coffee dot com slash fexingo. No pressure, just an option if you've gotten value from episodes like this. Luna: Yeah, it's a small way to keep the conversations going. And speaking of data, what about the caption placement itself? I've seen some brands put captions at the top of the screen, some at the bottom, some that bounce around. Lucas: Great question. There's a good rule of thumb from a company called Kapwing that analyzed thousands of captioned videos: keep captions centered, in the lower third, with a maximum of two lines at a time. And use a semi-transparent background behind the text — that way it's readable over any footage, even light backgrounds. Luna: What about animated captions — where words pop in one by one? Is that better for retention or just gimmicky? Lucas: It depends on the platform. On TikTok, word-by-word animations are almost expected now — they cue the energy of the video. On LinkedIn or YouTube, a more static, clean caption block tends to feel more professional. But the key is syncing: if there's a visual action — like a product being unboxed — the caption should appear exactly when the action happens, not a second before or after. Luna: So timing matters more than style. That makes sense. What about the visual storytelling itself — if you remove audio, you lose voiceover explanation. How do you convey a complex idea without narration? Lucas: You replace spoken explanation with visual sequence. Instead of saying 'our software automates invoicing,' you show a screen recording where an invoice is generated, sent, and marked paid — all in five seconds, with a single line of caption at the bottom: 'Invoicing, automated.' The viewer infers the rest. It's show, don't tell, pushed to its extreme. Luna: And that actually might work better for retention, because the viewer is doing the work of connecting the dots. They're more engaged. Lucas: Exactly. There's a term for it — 'active viewing.' When the viewer has to interpret what they're seeing, they encode the information more deeply. Audio can make things too easy, and easy gets scrolled past. Luna: So who should test this first? Is it only for B2B or product demos, or can a lifestyle brand or a restaurant use silent captioned video? Lucas: I think any brand that posts on social media should test it. A restaurant could do a silent video of a chef plating a dish — close-ups of the knife work, the sauce drizzle, the plating — with captions like 'Hand-cut pasta. Slow-simmered ragu. Plated to order.' That's more appetizing than someone talking over it. Luna: I've actually seen that — there's a pizzeria in Chicago called Paulie Gee's that does silent slo-mo videos of pizzas coming out of the oven. No audio, just a sparkler-like shot of the fire, and the name of the pizza in text. They're incredibly shareable. Lucas: Perfect example. And the key there is that the video is designed for the silent format from the start. It's not a regular video with captions slapped on as an afterthought. The pacing, the shots, the text — they're all built for a mute experience. Luna: So what's the first step for a marketer who wants to try this? Should they just turn off the audio in their next video and add captions, or do they need to reshoot? Lucas: You can repurpose existing footage, but you'll want to do a few things. First, make sure the visual story is clear without audio — if your original video relied on a voiceover explaining a process, you may need to add on-screen text or graphics to fill in the gaps. Second, tighten the edit — silent videos feel slower if there's dead air visually, so cut shots shorter. Third, add a progress bar or a countdown if it's a longer video, so viewers know how long they're committing to. Luna: What about music? Even if it's silent auto-play, once someone taps to turn on sound, do you want a track ready? Lucas: Yes, always include audio as a fallback. A lot of platforms — Instagram, TikTok — will show a 'sound on' icon if the video has audio. That can actually increase engagement because it gives the viewer control. But the video should work perfectly without it. Think of the audio as a bonus, not the backbone. Luna: Are there any metrics specifically for silent video performance? Like, is there a way to tell if someone watched with sound off versus on? Lucas: Most platforms don't give you that directly, but you can infer. If the completion rate is high and the click-through rate is up, and you know a large percentage of your audience watches on mobile without sound, it's a strong signal. Some advanced analytics tools like Wistia or Vidyard can track if audio was ever unmuted, but for social platforms, you're usually in the dark. That's why A/B testing is so important — compare a captioned silent version against a standard audio version and see which drives your goal. Luna: So the takeaway: don't assume your audience hears you. Design for silence first, and treat audio as a layer you can add, not the foundation. Lucas: Exactly. And I think this is one of those shifts that's going to become standard practice over the next few years. As attention spans get shorter and mobile consumption grows, the brands that master silent storytelling will have a real advantage.