Conflict with New Image Gallery and other

Hello, I just installed your “New Video Gallery” plugin but it created CSS conflicts with your other “New Image Gallery” plugin and with the “Lana – Download Manager” plugin (https://fr.www.ads-software.com/plugins/lana-downloads-manager/).

Before adding the shortcode video gallery: https://www.laraider.com/bug0.jpg
After adding the shortcode video gallery: https://www.laraider.com/bug1.jpg

As I really like your plugin for Images, I would really like to be able to use that of Videos too.

Thank you in advance for your help.