#my-video {
    width: 100% !important;
    height: 500px !important;
    max-width: 100%;
    object-fit: contain;
}

.video-js.vjs-fullscreen {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
}

@media (max-width: 768px) {
    .video-js.vjs-fullscreen {
        width: 100vw !important;
        height: 100vh !important;
    }
}