demo

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var obtn=document.getElementById(‘video’);
var ovideo=document.getElementById(‘video-btn’);
var oatn=document.getElementById(‘video-area’);
var oshut=document.getElementById(‘video-shut’);
var oshadow=document.getElementById(‘shadow’);
obtn.οnclick=function () {
ovideo.style.display=‘block’;
oshadow.style.display=‘block’;
oatn.innerHTML=’ ';
}
oshut.οnclick= function () {
ovideo.style.display=‘none’;
oshadow.style.display=‘none’;
oatn.innerHTML="";
}