.yt-button-simple-fslb-mvb {
    content: url('../css/icon-fullscreen-white.png') !important;
    z-index: 20;
    position: absolute;
    height: auto;
    width: auto;
    padding-left: 5px;
    padding-right: 5px;
    background: #f50505af;
    border-radius: 4px;
}

.yt-button-simple-fslb-mvb:hover {
    -webkit-box-shadow: 1px 3px 14px 0px rgba(0, 0, 0, 0.68);
    box-shadow: 1px 3px 14px 0px rgba(0, 0, 0, 0.68);
    background: #f50505ff;
}

.slfs-ovl-btn {
        position: absolute;
        left: 8px; top: 8px;
        background: #e53935; color: #fff;
        border: none; border-radius: 3px;
        padding: 4px 6px; font-size: 12px; line-height: 1;
        cursor: pointer; z-index: 2;
        opacity: 0.9; transition: opacity .2s ease;
      }
.slfs-ovl-btn:hover { opacity: 1; }
.slfs-ovl-wrap { position: relative; }
.slfs-hidden-link { display: none !important; }