.hidden-video {
    position: fixed;
    left: -100px;
    top: -100px;
    width: 16px;
    height: 9px;
    opacity: 0;
    pointer-events: none;
}

@keyframes loading-spin {
to { transform: rotate(360deg); }
}
.loading {
animation: loading-spin 1s linear infinite;
}