Do Captions Actually Help Your Videos Perform Better?

I keep seeing people ask this in creator communities, so I went and looked at the actual research. Not opinion pieces, actual studies with numbers.

The numbers

There have been a handful of real studies on this. Here's what they found:

• Viewers are 80% more likely to watch a video all the way through when it has captions (PLYMedia)
• 69% of people watch videos on mute in public, and 25% do it even at home (Verizon Media/Publicis, 2019)
• Facebook videos with captions get 12% more watch time (Facebook's own data)
• Captioned Facebook video ads get 16% more reach (Instapage ran an A/B test on this)
• YouTube videos with closed captions get 7.32% more views (Discovery Digital Networks tested across 125 videos)
• 38% better completion rates when videos have subtitles (PLYMedia)

None of these are huge individually, but they all point the same direction. Captions help.

The mute thing is real

Think about how you scroll through Instagram or TikTok. You're on the bus, or you're in bed and don't want to wake someone up, or you're bored in a meeting. You're not wearing headphones. The phone is on silent.

That's most of your audience. If the first few seconds of your video are just someone talking with no text on screen, people have no idea what the video's about. They scroll past.

How it plays out on each platform

TikTok

TikTok cares about watch time and completion rate when deciding whether to push your video to more people. Captions keep people watching when their phone is on mute, which means better retention numbers, which means the algorithm treats your video better. TikTok themselves recommend adding captions.

Instagram Reels

Reels auto-play on mute in the feed. Without captions, the first thing someone sees is a silent video. With captions, they can immediately tell what it's about and decide to keep watching.

LinkedIn

LinkedIn videos always start muted. And the audience is mostly watching at work or in meetings, so they're definitely not turning the sound on. If you're posting video on LinkedIn, captions are basically required.

YouTube

YouTube has decent built-in closed captions for longer videos. For Shorts though, burned-in captions work better since they're always visible while people scroll.

It's not just an accessibility thing

This surprised me: 80% of people who use captions don't have any hearing impairment (Verizon Media/Publicis). They just prefer watching with captions on. It's how people watch now.

That said, over 430 million people worldwide do have hearing loss (WHO), so captions genuinely help with accessibility too.

Bottom line

Every study says the same thing: videos with captions do better than videos without. More views, more watch time, more reach.

Adding captions takes about 30 seconds with most tools these days. Upload, wait for the AI, download. It's not a big lift.