iframe插入视频,点击按钮播放

<iframe src="https://www.youtube.com/embed/gc9oMqXZXGM?enablejsapi=1&version=3&playerapiid=ytplayer" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<script>
$('.button').on('click',function(){
$('.parentbox').find('iframe')[0].contentWindow.postMessage('{"event":"command","func":"' + 'playVideo' + '","args":""}', '*');
})
</script>