style="transform: rotate(270deg)"
var eles = document.getElementsByTagName("video"); for (i=0;i<eles.length;i++) eles[i].style.transform="rotate(270deg)";
https://www.runoob.com/jsref/prop-style-transform.html
https://c.runoob.com/codedemo/1069/
标签：style,runoob,元素,transform,旋转,HTML,https,com From： https://www.cnblogs.com/wintertone/p/16879372.html