Issue: I can't post a video in my blog from youtube?

I tried to post a video in a blog entry, it's something I always did and I always do the same way, I click in the video icon, I paste the video location and post. It always worked but I can't make it work this time.
What am I doing wrong? Or is it a forum issue?

This is the entry that doesn't work:
http://aarinfantasy.com/forum/blogs/...-to-dance.html

and this is an old entry that worked:
http://aarinfantasy.com/forum/blogs/...-illusion.html

I noticed that the code generated by the editor is different.