Slightly off topic but I really hate how youtube tests stuff. I'm sure theres some rhyme or reason to it but from the end-user's perspective it just seems random. Example: I really like the "lower lights" feature on hulu which darkens the page background around the video. I remember for several months I would come across a button to do the same thing on youtube but it would only show up maybe 5% of the time. I can see no reason why that feature would be dependent on the video itself because it has to be just a simple CSS/JS trick.
