YouTube Breaks Embeds Everywhere
Update 10:43 PM - Aaaaand they’re back.
Tonight an unexpected change occurred in regards to YouTube’s iFrame embed service. The X-Frame-Options response headers for all YouTube videos served via the http://youtube.com/embed/:embedid format URL were changed to SAMEORIGIN. Meaning that, theoretically, only iframes serving YouTube videos on YouTube.com will be allowed.
This seems to me like a strange and most likely unintentional change, but currently it means that most YouTube embeds across the net aren’t working.