I've just noticed for the first time a 'Favorite' button in the YouTube player. This was on my on YouTube channel. In de screenshot you see the message 'An error occurred, please try again later.' wich i'm getting a lot lately.

websonic.nl/nieuws/052009/imag ...

it is in every embedded player at the end or in the menu, when you are logged in

eg:

+ Show video

The player is also showing the tooltip for time when the mouse's over the progress bar. It's pretty neat.