AI search the YouTube knowledge community — SubDownload

# SubDownload > AI-searchable knowledge base of YouTube video summaries. Paste a YouTube link to add a summary, or search a topic across community-shared summaries. Free to start. SubDownload turns long-form video into searchable text and AI summaries — captions when available, our own ASR when not, summaries in 11 languages. Each public summary lives at `/kb/v/{videoId}` with a stable canonical URL, JSON-LD Article + VideoObject metadata, oEmbed discovery, and an iframe-embeddable widget. ## Knowledge Base - [Knowledge Base index](https://subdownload.com/kb): Browse community-shared YouTube video summaries. - [Summary detail page](https://subdownload.com/kb/v/{videoId}): Per-video summary with transcript, comments, and likes. - [oEmbed endpoint](https://subdownload.com/api/oembed): oEmbed 1.1 provider for any `/kb/v/{videoId}` URL — JSON only. - [Embeddable widget](https://subdownload.com/embed/v/{videoId}): Minimal iframe-friendly summary card with attribution back to the canonical KB page. ## Tools - [Transcript tool](https://subdownload.com/transcript): Paste any YouTube URL, get the transcript or ASR fallback in your language. - [Pricing](https://subdownload.com/pricing): Free quota for casual use; paid tiers for higher volume + API access. - [Docs](https://subdownload.com/docs): API reference, MCP server, integrations. ## API & integrations - [OpenAPI spec](https://manage.subdownload.com/openapi.yaml): Machine-readable API contract. - [MCP server](https://github.com/SubDownload/subdownload-mcp): Model Context Protocol server for Claude / ChatGPT / Cursor / LangChain workflows. ## Optional - [Privacy policy](https://subdownload.com/privacy) - [Terms of service](https://subdownload.com/terms) - [DPA](https://subdownload.com/dpa)