.play_video iframe { 
height: 648px !important; 
display: block; margin: auto; 
width: 100% !important; 
background: #000000; 
}
@media screen and (min-width: 979px) and (max-width: 1200px) {
.play_video iframe { height: 558px !important;}
}
@media screen and (min-width: 769px) and (max-width: 978px) {
.play_video iframe { height: 414px !important;}
}
@media only screen and (max-width: 768px) {
.play_video iframe { height: 342px !important;}
}
 @media only screen and (max-width: 640px) {
.play_video iframe { height: 256px !important;}
}
 @media only screen and (max-width: 480px) {
.play_video iframe { height: 200px !important;}
}