Hi,
Thanks for choosing our product!
Because you are using Primary Color is White and it cause the issue.
You can go to Appearance -> Customize -> Additional CSS & add this code:
.video-shortcode-wrapper.grid .video-content .video-filter.style_1 li a:hover, .video-shortcode-ajax.grid .video-content .video-filter.style_1 li a:hover, .video-shortcode-wrapper.masonry .video-content .video-filter.style_1 li a:hover, .video-shortcode-ajax.masonry .video-content .video-filter.style_1 li a:hover, .video-shortcode-wrapper.grid_special .video-content .video-filter.style_1 li a:hover, .video-shortcode-ajax.grid_special .video-content .video-filter.style_1 li a:hover, .video-shortcode-wrapper.grid .video-content .video-filter.style_1 li a.selected, .video-shortcode-ajax.grid .video-content .video-filter.style_1 li a.selected, .video-shortcode-wrapper.masonry .video-content .video-filter.style_1 li a.selected, .video-shortcode-ajax.masonry .video-content .video-filter.style_1 li a.selected, .video-shortcode-wrapper.grid_special .video-content .video-filter.style_1 li a.selected, .video-shortcode-ajax.grid_special .video-content .video-filter.style_1 li a.selected {
color: #000;
}
Hope this helps!
****
Regards,
HaruTheme