The Technical Difference
Subtitles are text translations of dialogue intended for viewers who do not speak the video's language. They assume the viewer can hear the audio but needs a language translation.
Captions include dialogue plus descriptions of relevant sounds — music, applause, laughter, sound effects — intended for viewers who cannot hear the audio. Closed captions (CC) can be toggled on and off. Open captions are burned into the video and cannot be removed.
In practice, especially on YouTube, the terms are used interchangeably. YouTube's auto-generated text is labeled "captions" but functions as subtitles — it transcribes dialogue without describing sound effects.
Types of YouTube Captions
YouTube offers two types of captions:
Auto-generated captions: created automatically by YouTube's speech recognition AI. Available on most videos in supported languages. Accuracy exceeds 95% for clear English speech but drops for accents, technical jargon, and noisy audio.
Manual captions: uploaded by the video creator or a professional captioner. Near-perfect accuracy. Some creators commission professional captioning services for accessibility compliance.
You can tell which type a video has by looking at the caption selector in the YouTube player. Auto-generated tracks are labeled "(auto-generated)" next to the language name.
Why This Matters for Transcript Extraction
When you extract a transcript from a YouTube video, you are pulling from the same caption data that displays in the video player. If the video has manual captions, your transcript will be near-perfect. If it only has auto-generated captions, accuracy will be high but not flawless.
Our transcript tool automatically selects the highest-quality caption track available. If both manual and auto-generated captions exist, it prefers manual. You can also switch between available tracks to extract captions in different languages.
Accessibility and Legal Requirements
Captions are not optional for many organizations. The Americans with Disabilities Act (ADA), Section 508, and the Web Content Accessibility Guidelines (WCAG) require text alternatives for multimedia content. Educational institutions, government agencies, and large businesses must provide captions for video content.
Extracting and publishing transcripts is one of the simplest ways to meet these requirements. Extract the transcript, review it for accuracy, and publish it alongside the video. This provides both an inline reading experience and a downloadable text alternative.