http://www.youtube.com/watch?v=JkVNb_SLq18
If you have a slowish Broadband which causes buffering pauses, click the Pause icon in the bottom left corner, then click the resolution up to 1080p...Now WAIT as the pink band moves from left to right, till it gets about halfway across. Now click that same Pause icon to start it running again and finally click the Full Screen icon at bottom right...It should now run through without further pausing.
At the end you will see a "Replay" button...If you click that you will get an uninterrupted full screen replay!
Thanks for looking
