.video-js .vjs-watermark-content {
    max-width: 140px !important;
    max-height: 140px !important;
}

.video-js .vjs-watermark-content img, .video-js .vjs-watermark-content a img{
    max-width: 100% !important;
    max-height: 100% !important;
}

@media(max-width:720px) {
    .video-js .vjs-watermark-content {
        max-width: 100px !important;
        max-height: 100px !important;
    }
    .video-js .vjs-big-play-button {
        font-size: 3em !important;
    }
}

@media(max-width:420px) {
    .video-js .vjs-watermark-content {
        padding: 10px !important;
        max-width: 60px !important;
        max-height: 60px !important;
    }
    .video-js .vjs-big-play-button {
        font-size: 2em !important;
    }
}