MAGETWO-45064: Video preview is visible under video player

Author: Volodymyr Zaets

app/code/Magento/ProductVideo/view/frontend/web/js/fotorama-add-video-events.js

@@ -600,7 +600,7 @@ define([
                     return;
                 }
 
-                if (!videoPreview.is('visible')) {
+                if (!videoPreview.is(':visible')) {
                     videoPreview.show();
                 }