/**
 * Helpers for the `<YouTube>` content component. Kept in a sibling `.ts` (like
 * `diff.ts`/`github-info.ts`) so the id parsing and embed-URL building are pure,
 * unit-testable functions — the `.astro` file stays a thin presentational shell.
 */
/**
 * Resolve a YouTube video id from either a bare id or a full URL. Returns `null`
 * when nothing that looks like an id can be found, so the component can render
 * nothing rather than a broken embed.
 */
export declare const parseYouTubeId: (input: string) => string | null;
/**
 * Build a privacy-enhanced (`youtube-nocookie.com`) embed URL, optionally
 * starting at `start` seconds.
 */
export declare const youtubeEmbedUrl: (id: string, options?: {
    start?: number;
}) => string;