Captions for How-To Videos: How to Add Them and Get Them Right
Why every how-to video needs captions, the difference between open and closed captions, how to create and check them, and style rules for instructions.
Short answer
To caption a how-to video, generate a first draft with your editing software's or hosting platform's automatic captions, then correct every line by hand, especially part names, numbers and warnings. Export the captions as an SRT or WebVTT file and upload it with the video (closed captions), or burn them into the picture for platforms that autoplay muted (open captions). Keep each caption to one or two short lines.
Why how-to videos need captions more than most
People watching a how-to video are often in a noisy place (a workshop, a kitchen, a shop floor) or a quiet one where they cannot play sound. Captions also make the video usable for people who are deaf or hard of hearing, help non-native speakers catch technical words, and give search engines text to understand. For instructions, there is one more reason: a viewer can read a part name or a number that they would mishear.
Open or closed captions?
- Closed captions are a separate file the viewer can switch on or off. Best for your website and YouTube, and easy to translate.
- Open captions are burned into the picture. Best for social platforms that play videos muted, but they cannot be turned off or translated later.
If you do both, make the closed-caption file first and burn in from it, so the two never disagree.
How to make them
- Finish the edit first. Captions made before the final cut drift out of sync.
- Generate automatic captions in your editor or on your hosting platform.
- Correct them against your script: part names, numbers, units and warnings must be exact.
- Split long sentences so each caption is one idea, one or two lines.
- Check timing: each caption appears when the words are spoken and stays long enough to read.
- Export as SRT or WebVTT and upload with the video.
Style rules for instruction captions
- Use the same part names as the manual and the on-screen labels.
- Write numbers as digits: "Tighten 4 screws", not "four".
- Put warnings in their own caption, not tucked into a longer line.
- Describe important sounds in brackets: [click], [beep].
- Keep captions clear of on-screen labels and the key action; move them if they cover the step.
Or design it to need fewer words
The easiest caption to translate is the one you do not need. Instruction videos that show every action clearly, with arrows and highlights, can carry most of the meaning without narration and only use short labels. Animated instruction films, like those Manual to Video makes from manuals, often work this way, with captions included.
Caption check
- Made after the final edit
- Every line corrected by hand against the script
- Part names and numbers match the manual
- Warnings in their own caption
- One idea per caption, one or two lines
- Sounds that matter described in brackets
- Captions do not cover the key action
- Closed-caption file uploaded; burned-in version for muted platforms
Questions people ask
Are automatic captions good enough?
They are a good first draft, but they often get technical words, part names and numbers wrong. For instructions, correct every line by hand.
What is the difference between captions and subtitles?
Captions are written for viewers who cannot hear the audio and include relevant sounds. Subtitles translate speech for viewers who can hear it but do not understand the language. In practice the terms are often used interchangeably.
Which caption file format should I use?
SRT is the most widely supported. WebVTT is the standard for video on web pages. Most tools can export both.