Error when creating video tag from youtube.

Error when creating video tag from youtube.

I am trying to create a video tag of a youtube video. When I enter the youtube URL, the thumbnail shows in the "Add Video Tag" dialog. When I press the save button, I get an error that reads "Failed to load the thumbnail image. Please check your video link."

I have tried this with several different youtube video links as well as on different browsers - MacOS Chrome and MacOS Safari.