I have a Collection setup with “Video Link” URLs.
They are valid URLs, but for some reason some of them are not being recognised by Webflow all of a sudden. This means the thumbnail preview is not showing in the Collections edtior and the videos have become unpublished on the live site, though (to the best of my knowledge) they were there previously and had been published successfully.
If I cut / paste the (exact same) URL in the CMS editor, it will be recognised by Webflow and the thumbnail preview + details will appear in the editor.
Not sure if this is a bug with the CMS. Can’t see why else they would become unpublished?