.youtube_wrap {
    max-width: 950px;
    margin: 0 auto 35px;
}

.youtube_inner {
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    position: relative;
}

.youtube_inner iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.youtube_inner iframe {
    border: none;
}