<iframe src="http://wosai-statics.oss-cn-hangzhou.aliyuncs.com/opr-activities-h5/static/video-uni.mp4" allowfullscreen="true"> </iframe>
#d1
{
width: 50px;
height: 50px;
background-color: aqua;
display: inline-block;
}
#d2
{
width: 100px;
height: 50px;
background-color: black;
float: left;
clear: both;
}
#d3
{
width: 150px;
height: 50px;
background-color: orange;
float: left;
}
#d4
{
width: 300px;
height: 50px;
background-color: yellow;
/* clear:both;*/
}