I cannot find the video gallery module.

With Livemesh Addons for Elementor, the Gallery module is versatile enough to act as both Image Gallery as well as Video Gallery. The Gallery type is decided by the Item Type specified when adding items to the gallery module instance. The Item Type for a gallery item can be Image, YouTube Video, Vimeo Video or a self hosted MP4 video.

Apart from the Gallery widget, one can use the powerful video grid addons like YouTube Grid, Vimeo Grid to showcase videos hosted on YouTube/Vimeo by utilizing the power of APIs supported by these platforms.

Does it work with the theme that I am using?

Our tests indicate that the elements work well with most themes that are well coded. You may need some minor custom CSS with themes that hijack the styling for heading tags by using !important keyword.

The demo site is best recreated with a theme that supports a full width page template without sidebars. The elements can still be used in the pages of default template.

How to enable the dark version for any element?

In Elementor page builder, edit the section wrapper for the element representing a row of elements. Navigate to the ‘Advanced’
tab of the ‘Edit Section’ sidebar window. Scroll down to the bottom of this tab to the ‘Advanced’ section and input class ‘lae-dark-bg’ in the ‘CSS Classes’ field to activate the dark version of an element.

My portfolio grid does not show any items.

Pls install and activate the Portfolio Post Type plugin to enable custom post type Portfolio.