wpvideogallery

Does this mean I must shy away from all lazy loading in the future?

Sorry, you can continue using that plugin or any other lazy loading plugin. But, the images in our plugin was blocked by the lazy loading plugin you use. This is the reason I suggested to disable it. Simply contact the lazy loading plugin author and report him about this issue. May be this could be a matter of a setting in their plugin which I’m not aware of. But, they could suggest a fix for this problem. Then, you can start using both the plugins.

Do you use any lazy loading plugin? Kindly try disabling the plugin.

Hope, this solved your issue!

Generally, when you upload a video using our plugin’s video form, the video file is stored in the WordPress media and linked to our Custom Post Type “aiovg_videos”. But, there is not any option to automatically link the video files directly added to the WordPress media or through some other post types (posts).

The only solution is to use our Video form and link the video from WordPress media to our custom post type. Please refer https://plugins360.com/all-in-one-video-gallery/add-your-first-video/

Kindly try adding the following code in your theme’s functions.php file. This should enable the “Featured Image” meta box in the video form.

function aiovg_custom_init() {
    add_post_type_support( 'aiovg_videos', 'thumbnail' );
}
add_action( 'init', 'aiovg_custom_init', 11 );

Hope, this helped you!