1. let v=document.getElementById("video1");
    2. let c=document.getElementById("myCanvas");
    3. ctx=c.getContext('2d');
    5. v.addEventListener('play',function() {
    6.   let i=window.setInterval(function() {
    7.     ctx.drawImage(v,0,0,270,135)
    8.   },20);
    9. },false);
    11. v.addEventListener('pause',function() {
    12.   window.clearInterval(i);
    13. } ,false);
    15. v.addEventListener('ended',function() {
    16.   clearInterval(i);
    17. },false);