correctly utilizing two safari windows with two displays?

So, I just bought the new apple display and I loves it.

I enjoy being able to utilize two safari windows, one on each display. However, one thing that I cannot find a workaround to is confusing me:

I typically run video content from iTunes/Youtube/Vimeo/etc on my secondary display, while I browse on my primary. The problem is, when I full-screen the content being played on my secondary display and go to back to browsing, the moment I click on my primary's safari window, the secondary's safari window exits full-screen.

Any idea on how to browse while my content stays full-screened?

Looking forward to any word in return!

 

bump!!!