We'll create fresh WordPress site with Youtube Thumbnail as Featured Image installed. You have 20 minutes to test the plugin after that site we'll be deleted.
YouTube Thumbnail to Featured Image, as its name says, is a plugin that helps you to set a YouTube video thumbnail as a featured image of a post. The user just have to set a YouTube video URL and the plugin will do the rest.
The video thumbnail will be imported to your media library, so you can use it anywhere else.