Captions are one of those things everyone knows are important, but very few people truly understand. We often get questions like:
- What does burnt-in captions mean?
- Why did you also send an .srt file?
- Do I need captions for Instagram if people watch with sound?
This guide is designed to answer those questions, so you know what you’re getting, why it matters, and how to use captions properly across different platforms.
Why captions matter more than ever
Captions aren’t just about accessibility (although that’s a big part of it). They’re now essential for performance.
- Many people watch videos with the sound off, especially on social media
- Captions improve engagement and watch time
- They help with clarity in noisy environments
- They support accessibility requirements
In short: captions are no longer optional. They are part of professional video delivery.
How we usually deliver captioned videos
When captions are included in your project, we typically deliver three versions:
- A final video with captions burnt in
- A final video without captions
- A sidecar caption file (.srt)
Each of these serves a different purpose.
What “burnt-in captions” mean
Burnt-in captions (also called embedded captions) are captions that are permanently part of the video image.
- They cannot be turned on or off by the viewer
- They will always appear, no matter where the video is played
When burnt-in captions are best
Burnt-in captions are ideal for social media, short-form content, and situations where you must guarantee captions are visible.
Platforms like Instagram and TikTok do not support separate caption files in a meaningful way. They expect captions to be part of the video itself.
Best practice:
If the video is for social media, burnt-in captions are the safest and most reliable option.
What an .SRT file is and why it’s useful
An .srt file (SubRip Subtitle file) is a plain text file that contains the caption text and timecodes that tell a platform when each caption should appear.
It does not contain any video. It is simply the captions.
Why we include an .srt file
The .srt file gives you flexibility.
For example, on YouTube, you can upload the video without captions and then upload the .srt file separately. This allows viewers to turn captions on or off, change caption size, and use automatic translations.
This approach works particularly well for long-form, educational, and corporate content.
Burnt-in captions vs .SRT captions
Here is a simple way to think about the difference:
- Burnt-in captions: always visible, cannot be turned off, visually styled, best for social platforms
- .SRT captions: optional for the viewer, platform-controlled styling, cleaner visual, ideal for YouTube and websites
| Feature | Burnt-in captions | .SRT captions |
|---|---|---|
| Visibility | Always visible | Viewer can turn on or off |
| Customisable by viewer | No | Yes (size, language, style) |
| Visual styling | Fully styled as part of the video | Controlled by the platform |
| Best for social media | Yes (Instagram, TikTok, Shorts) | No |
| Best for YouTube (long-form) | Sometimes | Yes |
| Accessibility features | Limited | Strong (screen readers, translations) |
This is why we usually deliver both.
Caption best practices by platform
| Platform | Recommended caption format | Why this works best |
|---|---|---|
| YouTube (long-form) | Clean video + .SRT file | Allows viewers to toggle captions on or off, supports accessibility features, and keeps the video visually clean. |
| YouTube Shorts | Burnt-in captions | Short-form vertical content is often watched without sound, so captions must be immediately visible. |
| Instagram (Feed, Reels, Stories) | Burnt-in captions | Instagram does not reliably support separate caption files, so captions should be embedded in the video. |
| TikTok | Burnt-in captions | TikTok viewers scroll quickly and often watch silently, making clear on-screen captions essential. |
| Website embeds | Clean video + .SRT file | Provides a cleaner visual while still supporting accessibility through the video hosting platform. |
Caption style: what works best
Not all captions should look the same.
- Keep text concise
- Break lines naturally
- Avoid covering key visuals such as faces
- Ensure strong contrast for readability
Social media captions are often larger and more dynamic, while corporate or educational videos benefit from cleaner, more neutral captions.
Why we deliver both captioned and non-captioned versions
Different platforms and audiences require different approaches.
Delivering a captioned version, a clean version, and an .srt file ensures your video can be reused across platforms without needing re-edits later.
Final takeaway
Captions are not just a technical add-on. They are a strategic part of video communication.
- Burnt-in captions ensure visibility where platforms demand it
- .srt files provide flexibility and accessibility where supported
- Different platforms require different caption strategies
Our goal is not just to add captions, but to make sure they are delivered correctly and work where your video will be published.
If you are ever unsure how to use the files we deliver, just ask. We are always happy to help.
