Do Captions Increase Views? What the Research Actually Shows
The famous sound-off and caption statistics traced to their sources, and what they do and don't prove for TikTok, Reels and Shorts creators.
By the Capsubs team · Updated · 3 min read
Captions help videos get watched to the end: in a 2019 survey of 5,616 US adults by Verizon Media and Publicis Media, 69% said they watch video with the sound off in public and 80% said they're more likely to watch a whole video when captions are available. There's no public study proving captions directly raise view counts on TikTok or Reels, but watch time and completion are signals every short-form platform rewards, so captions help indirectly.
The numbers and where they come from
| Claim | Source | Notes |
|---|---|---|
| 69% watch with sound off in public; 25% even in private | Verizon Media & Publicis Media survey, April 2019, 5,616 US adults aged 18–54 | Self-reported survey |
| 80% more likely to watch a full video with captions | Same survey | Self-reported intent |
| 50% say captions matter because they watch muted | Same survey | |
| Captions lifted ad recall 8% and brand linkage 13% on mobile | Same report | Measured on ads |
| Captions increased Facebook video view time by 12% | Facebook video ad study, cited widely since 2016 | Ads, older data |
| "85% of Facebook video is watched without sound" | Digiday report, 2016 | Old, Facebook-only, often misquoted |
The most-repeated "85%" figure is a decade old and about Facebook feed video, so treat it with caution. The 2019 Verizon/Publicis survey is the best-sourced general number.
What a recent study adds
A 2024 eye-tracking study by Agnieszka Szarkowska and colleagues had 168 viewers watch subtitled clips with and without sound. Without sound, viewers relied on the text much more heavily and found it harder work: comprehension, immersion and enjoyment all dropped slightly. The takeaway for creators: on mute, the captions carry the video, so they need to be accurate, readable and well-timed.
Why captions can lift performance on short-form
Short-form algorithms reward videos that people keep watching. Captions help with that by:
- Making the first seconds understandable on mute, so fewer people scroll past.
- Keeping attention. Moving, highlighted words give the eye something to follow.
- Making the point land for viewers who never turn the sound on.
- Reaching more people: deaf and hard-of-hearing viewers, non-native speakers, people in noisy places.
When captions don't help
- Wrong words. Misspelled names and garbled lines look careless. Fix them before posting.
- Covered captions. Text under the app's buttons can't be read. Use the safe zones.
- Too much text. Whole sentences on screen are harder to read than two or three words. How many words per line.
- Clashing with the visuals. If the video is mostly music and scenery, captions may not add anything.
How to test it yourself
Post similar videos with and without captions over a few weeks and compare average watch time and completion rate in your analytics, not just views. Change one thing at a time.
FAQ
Do captions help TikTok SEO? TikTok and YouTube transcribe speech for search; on-screen text may also be read. Clear speech and accurate captions help both, but no platform publishes how much.
Should every video have captions? Any video where speech matters, yes. Purely visual or music videos may not need them.
What's the easiest way to add them? Each platform's built-in tool, or a caption tool like Capsubs if you want styled, word-by-word captions that work on every platform.
Caption your next video in a minute
Upload a TikTok, Reel or Short, pick a style and get it back with word-by-word captions burned in. Free to start, no watermark.