.videowrapper {
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 30px; 
    height: 0; 
    overflow: hidden;
}
.videowrapper iframe, 
.videowrapper object,
.videowrapper embed {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.bst-responsive-video { 
position: relative;
padding-bottom: 56.25%;
height: 0;
margin: 20px 0;
overflow: hidden;
}
.bst-responsive-video iframe, .bst-responsive-video object, .bst-responsive-video embed {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}