Make overlay only on these thumbnails but not other ones

There’s a pretty easy solution to this. You can use if ( get_video_thumbnail( $post_id ) != null ) in your template to add a class to posts that have a video thumbnail and then only target those in CSS.

You completely set me on the right path… THANKS!

Since I’m using Toolsets “Views” plugin, I came up with some neat code to overlay the word video:

[wpv-if video_thumbnail="_video_thumbnail" evaluate="!empty($video_thumbnail)"]
 <div class="overlaywordsvideo">VIDEO!</div>
[/wpv-if]

The only problem is that now I realize that some of our articles have LINKS to videos. And with the newer wordpress Oembed, even those links are triggering your plugin to create thumbnails. I only want to highlight posts WITH videos, not linked to videos.. sigh..

We decided to go with an admin checkbox after all so we can manually differentiate.

I wish there was a better fix right now, but I think I could come up with a way to better solve the problem sometime down the road.

The value stored in the custom field is currently the URL of the full-sized video thumbnail, and that could be compared to the value of the full-size version of the featured image. If they don’t match, you’ll know the featured image isn’t for a video.

Here’s a quick PHP function (haven’t tested it) that might help if you want to go this route:

function test_if_post_thumbnail_is_video( $post_id = null ) {

	if ( $post_id == null ) $post_id = get_the_ID();

	if ( ( $thumbnail_id = get_post_thumbnail_id( $post_id ) ) != '' ) {
		if ( ( $video_thumbnail_url = get_post_meta( $post_id, VIDEO_THUMBNAILS_FIELD, true ) ) != '' ) {
			$thumbnail_src = wp_get_attachment_image_src( $thumbnail_id, 'full' );
			if ( $thumbnail_src[0] == $video_thumbnail_url ) {
				return true;
			} else {
				return false;
			}
		} else {
			return false;
		}
	} else {
		return false;
	}

}

This isn’t really the best solution, but my plan down the road is to create a field with the video thumbnail’s ID. Once that’s in place you’d just be able to compare the featured image ID to the video thumbnail ID to know if it’s for a video.