You are adding Featured Videos using oEmbed or an embed code and have double-checked that the link or embed code is correct, yet the video still does not appear.
In most cases, this is due to your video being set as Private. Private videos will block oEmbed from being able to retrieve the information it needs, such as your thumbnail, likes or views. If you wish to use private videos, you will need to use the iframe embed code and upload your own featured images, if you desire thumbnails in your widgets. Note that YouTube or other hosts may block private videos from being embedded at all. Please check with your provider for details.