In Safari on Mac, when a new YouTube video gets embedded into a post or a page and I hit the preview button, the preview page does not show the video.
BUT
Safari does show the video if this page gets published
BUT
It does show it if I simply copy this same URL to the preview page from some other browser. So it only does not show it if I hit the preview button (the page shows, but not the video).
Any ideas? Thanks.
