1//Add the following CSS to your code
2
3
4.iframe-container{
5 position: relative;
6 width: 100%;
7 padding-bottom: 56.25%;
8 height: 0;
9}
10.iframe-container iframe{
11 position: absolute;
12 top:0;
13 left: 0;
14 width: 100%;
15 height: 100%;
16}