Embed Videos To Product Image Gallery Css Issue

Hi,

Earlier this plugin working perfectly with my woocommerce site but all of a sudden the CSS used in this plugin overrides the site style.css which results the site design was messed up.

Can you please explain what should be the cause for this.

This issue was raised on my product single page.
as it is a live site, for now, we have removed this plugin from our site.

Please assists as quick as possible.
thanks