export declare const youtubeIframeScripts: {
    startProgressTracking: string;
    stopProgressTracking: string;
    receiveMessage: string;
    sendProgress: string;
    onPlayerReady: string;
    onPlayerStateChange: string;
    onPlayerError: string;
    onPlaybackRateChange: string;
    onPlaybackQualityChange: string;
    onAutoplayBlocked: string;
};
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