Subtitles make your videos accessible, boost watch time, and help them rank — most viewers on social watch with the sound off. The good news: adding subtitles is mostly about generating an accurate caption file (SRT or VTT) and attaching it to your video. Here’s how to do it well.
SRT vs VTT: which format?
- SRT — the universal standard. Use it for YouTube, most editors, and social platforms.
- VTT — a web-native format with optional styling/positioning. Use it for HTML5 video and some web players.
When in doubt, export SRT. Good transcription tools (including ScribeForge) export both.
Step 1: Generate accurate captions
Auto-captions from social platforms are a starting point, but they stumble on names, jargon and punctuation. For clean subtitles, transcribe the video with a tool built on OpenAI Whisper:
- Add your video file (MP4, MOV, MKV…) to the app.
- Transcribe it — locally, if you want to keep the footage private.
- Export an SRT or VTT file with proper timing.
Accuracy tip: a Whisper-based transcript usually needs far less cleanup than platform auto-captions — especially for technical or branded terms.
Step 2: Review and edit the timing
Open the SRT in any text editor or subtitle tool and skim for:
- Misheard names and technical terms.
- Lines that are too long (aim for ~42 characters per line, two lines max).
- Timing that lags or leads the speech.
Step 3: Add the subtitles to your video
YouTube
In YouTube Studio, open your video → Subtitles → add language → Upload file → choose your SRT. YouTube displays them as toggleable captions.
Social (Instagram, TikTok, LinkedIn)
Either upload the SRT where supported, or “burn in” the captions using a video editor so they’re always visible — best for sound-off feeds.
Your own website
Use the HTML5 <track> element with a VTT file to show captions on a self-hosted video.
Step 4: Translate for a global audience (optional)
Once you have a transcript, you can translate it into other languages and export additional subtitle files — an easy way to reach viewers worldwide. ScribeForge supports 100+ languages.
Why bother? The payoff
- Accessibility — captions make content usable for deaf and hard-of-hearing viewers.
- Engagement — sound-off viewers stay longer when they can read along.
- SEO & reach — caption text is indexable and supports translation.
See transcription for YouTubers and captioning for accessibility, or download ScribeForge free to generate your first SRT.