> ## Documentation Index
> Fetch the complete documentation index at: https://docs.peec.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# YouTube in AI search — #2 most-cited domain, transcripts included

> Peec's 30M-source analysis (Mar 2026) — YouTube is the second most-cited domain in AI answers; AI pulls from video descriptions and auto-generated transcripts, including Shorts.

YouTube is the second most-cited domain in AI search and the dominant video source. Peec's 30-million-source US analysis ([full study](https://peec.ai/blog/top-domains-cited-by-ai-search-analysis-based-on-30m-sources), Mar 2026) found the vast majority of AI-referenced video content comes from YouTube — not just main-channel videos but also Shorts and YouTube Music pages.

Where AI actually pulls the content from: **both the video description and the auto-generated transcription**. The study documents clear cases of Google AI Mode building answers directly from a video description, and separate cases where it pulled from the transcript instead.

The often-missed publishing checklist item that follows: **review the auto-generated transcription before a video goes live** — it is citable source text, not just captions.

YouTube is especially valuable on Google's surfaces: AI Overviews heavily promotes it, making video a pathway into Google's AI answers that ChatGPT does not offer — see [Optimizing for Google AI vs ChatGPT](/research/optimizing-google-ai-vs-chatgpt). Full domain rankings: [Most-cited domains in AI search](/research/most-cited-domains-in-ai-search).

**Source:** [Top domains cited by AI search: Analysis based on 30M sources](https://peec.ai/blog/top-domains-cited-by-ai-search-analysis-based-on-30m-sources), Peec (Tomek Rudzki), Mar 2026.