Hey @kcawte just find your preloader class and add this css into the Visual Composer custom CSS area: SOme of the themes includes custom preloader and they injected to Video Gallery div. If you need quick assist please sent us your wp admin info via email. info @ themeofwp.com

.preloader + * {
opacity: 1 !important;
}

.preloader {
display: none !important;
}
.preloader + *:not(iframe) {
height: auto !important;
}