b-summers on "[Plugin: Shortcodes Ultimate] Video Thumbnails not showing in Safari"

Hello,

I noticed that in Safari only, the video thumbnails are black, and don't actually show. Is this a Safari thing, or the way the plugin works? I am using the [ su_youtube_advanced ] shortcode on this page:

http://www.raiderhansen.com/ideas-how-tos/video-gallery/

https://wordpress.org/plugins/shortcodes-ultimate/