Originally Posted by Uncle Mxy
Ahhh... 1 s33 n0w...
I use Firefox + a couple security extensions involving Flash (NoScript, Stop Autoplay) because I'm not a trusting person. With those extensions, Flash animations are opened in a way where it's not obvious to YouTube that it's embedded (probably by stripping the HTTP-Referer header, but I haven't explored what heuristics YouTube uses to determine what's "embedded").
So, it's always worked for me without my having to think about it, and I assumed that it worked for everyone else too. :)