Subtitles

Subtitles are text overlays displayed on video that represent the spoken content — dialogue, narration, or other audio — as readable text. Technically, "subtitles" originally referred specifically to foreign-language translations of dialogue in films shown to audiences who don't speak the film's language, while "closed captions" referred to same-language transcriptions of all audio for deaf and hard-of-hearing viewers. In contemporary digital video usage, the two terms are increasingly used interchangeably for any text representation of spoken content, regardless of whether translation is involved. Many creators now use "subtitles" to mean simply "the words on screen."

The practical formats for digital video subtitles are standardized: SRT (SubRip Text) is the most universal format — a simple text file containing timed text entries (start time, end time, text) that video players read and display as an overlay. VTT (WebVTT) is the web-standard equivalent, used in HTML5 video players. SRT and VTT are "soft" subtitles — they exist as separate files, can be turned on or off by the viewer, and can be updated or translated without re-encoding the video. Burned-in subtitles (hardcoded into the video frame) are permanently visible and cannot be turned off, but are compatible with all players without requiring separate caption file support.

For B2B video distribution, subtitles have become effectively mandatory rather than optional. Research consistently shows that 85% of Facebook video is watched without sound — autoplay-with-sound is disabled by default on most social platforms, and office viewing contexts make audio-off the norm rather than the exception. Viewers who encounter a video that's difficult to follow without audio will simply scroll past it. For accessibility compliance (WCAG, ADA, and equivalent standards that apply to many enterprise and government contexts), captions are a legal requirement rather than a best practice. Adding accurate SRT subtitles to every video — achievable in minutes with AI transcription tools — is one of the highest-ROI production investments available, expanding the effective audience of every piece of content without requiring re-editing.