.project-video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 oranı */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    margin-bottom: 20px;
    display: block !important;
    visibility: visible !important;
}
.project-video-container iframe,
.project-video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block !important;
    visibility: visible !important;
    z-index: 1;
}