import Video from "../models/Video";
/**
 * Retrieves the video information for the given video ID.
 * @param {number} videoId - The ID of the video.
 * @returns {Promise<Video>} A promise that resolves to the video information.
 */
export declare function getVideoInfo(videoId: number): Promise<Video>;
/**
 * Retrieves the URL of the preview video for the given video ID.
 * @param {number} id - The ID of the video.
 * @returns {Promise<string>} A promise that resolves to the URL of the preview video.
 */
export declare function getVideoPreview(id: number): Promise<string>;
/**
 * Extracts the video ID from a given URL.
 *
 * @param {string} url - The URL from which to extract the video ID.
 * @return {number} - The extracted video ID, or NaN if the URL does not match the expected format.
 */
export declare function getVideoId(url: string): number;