index.js

import React from 'react';
import ReactDOM from 'react-dom';
import YouTubePlayer from 'react-youtube-player';

class Parent extends React.Component {
    constructor () {
        super();

        this.state = {};

        setInterval(() => {
            this.setState({
                data: Math.random()
            });
        }, 500);
    }

    render () {
        return <YouTubePlayer data={this.state.data} />;
    }
}

ReactDOM.render(<Parent />, document.getElementById('app'));

import React from 'react';
import ReactDOM from 'react-dom';
import YouTubePlayer from 'react-youtube-player';

class Parent extends React.Component {
    constructor () {
        super();

        this.state = {};

        setInterval(() => {
            var state = {
                ...this.state,
                data: {
                    timestamp: Math.random()
                }
            };

            this.setState(state);
        }, 500);
    }

    render () {
        return <YouTubePlayer data={this.state.data} />;
    }
}

ReactDOM.render(<Parent />, document.getElementById('app'));