Hello,

You are Most Welcome. Using CSS for this could disturb the layout for the title and other things. If you still want the CSS then try adding the following Custom CSS in the Custom CSS for Mobile area under Theme Settings >> Custom CSS.

.yarpp-thumbnails-horizontal .yarpp-thumbnail > img {
width: 100px;
}

.yarpp-thumbnails-horizontal .yarpp-thumbnail {
width: 113px;
}

.yarpp-thumbnails-horizontal .yarpp-thumbnail-title {
width: 100px;
}

Sorry, you cannot copy the content created with WPBakery to Elementor or Elementor content to WPBakery you have to create them again.

Best Regards.