Embed youtube CSS in Drupal

Embed youtube CSS in Drupal

.field-item {
    position: relative;
    padding-bottom: 56.25%; /* - 16:9 aspect ratio (most common) */
    /* padding-bottom: 62.5%; - 16:10 aspect ratio */
    /* padding-bottom: 75%; - 4:3 aspect ratio */
    padding-top: 30px;
    height: 0;
    overflow: hidden;
}
 
.field-item iframe,
.field-item object,
.field-item embed {
    border: 0;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}