I made redesign of my website. On the page you see the blog archive. The featured image from the bricks article is an video. But i used in the template the featured image tag {featured_image}. But Bricks took the video from the content as featured image.
Sorry, but I don’t know how to replicate the issue you’re encountering.
First, as far as I know, that’s natively impossible. WordPress doesn’t allow a video to be the featured image, respectively, it’s impossible to use a video file in an img tag. So, you seem to be using a plugin or custom code to be able to select a video file?
Which Shortpixel plugin? There are multiple “shortpixel” image optimization plugins available, so I’m not sure which one to use. Did you check if there are any settings within the plugin that might impact it?