/**
 * Takes care of any necessary setup for autoplaying video. In practice,
 * this method will load the youtube iframe API for mobile environments
 * because mobile environments don't support the youtube autoplay param
 * passed in the url.
 *
 * @param {string} src
 * @param {boolean} needCookiesApproval
 */
export function setupAutoplay(src: string, needCookiesApproval?: boolean): Promise<any>;
/**
 * @param {HTMLIframeElement} iframeEl - the iframe containing the video player
 */
export function triggerAutoplay(iframeEl: HTMLIframeElement): void;