.iframe-responsive-wrapper {
    position: relative;
}
.iframe-responsive-wrapper .iframe-ratio {
    display: block;
    width: 100%;
    height: auto;
}
.iframe-responsive-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* video responsive */
.container-video {
    width:100%;
}
video {
    height:auto;
    width:100%;
    max-width:640px;
}
/* fin video responsive */