Try pasting the youtube url into a post on this site.

Here it is. A great tune from the 80s

http://www.youtube.com/watch?v=9JeBSDbAy80

And it works perfectly! Damn…

Plus, please have a look at this: http://validator.w3.org/check?uri=http%3A%2F%2Fwww.irsa-stringers.com%2F&charset=%28detect+automatically%29&doctype=Inline&ss=1&group=0&user-agent=W3C_Validator%2F1.3

I was looking at the validation. 13 errors. But the problem is…that’s NOT the theme I am using! It’s the old one!

I cleared the cache, switched off every damn thing but nothing changed…

Is it possible the option to use wp oEmbed (WP Admin > Settings > Media) has been turned off? Doubt it is that simple but needs checking.

Not really sure how I can help or advise on your validation issues however.

Both solved, Andy.

For the first issue, for some reason wp oEmbed was off.

For the validation problem…I have no clue. But it’s working now!

I will whisper quietly. Good news.

Andy, I found out what the problem was.

Cloudflare! And the site wasn’t much faster at all. Account closed immediately!

Actually I never understand this notion that if your site has to go off and interrogate with another server it can load faster! Someone needs to explain that one to me!
Glad you found it.