Same for me - no image. Like a lot of Richard V6 links to something available on the web, no image there either.
I can only assume the security on my computer believes it to be "dangerous" and has blocked the link from displaying.
Strange, I just used a standard youtube video link:
[video:youtube]http://www.youtube.com/watch?v=8XYypbINg3o[/video]
When I preview this, it looks like I've dropped the last 3 chars off the string, I think that might be a width restriction of the code paramaeter?
MacOS 14.2.1 Sonoma, Safari 17.2.1