When embedding Vimeo videos into a post, it does not work with all RSS readers. For example, when using the Facebook App. “RSS for Pages” – an empty post is displayed where a thumbnail of the video should be displayed. YouTube shortcodes seem to work as they do display a thumbnail, but the Vimeo shortcodes are lacking support on the RSS side of things. It would be nice if the jetpack shortcode embed was updated to support this.