Hello!
11/30/2012 I bought WDBVHT0060JCH-EESN (My Book Live Up 6Tb № [Deleted]).
I have a problem. WD all the time flashes green. He never stops and always doing something. He never sleeps.
Therefore, it is impossible to see anything. A single film. He slows down.
What to do?
I would not worry too much about the flashing green light, hopefully, he will change to a steady green light and then eventually blue. Be sure to enable Hard Disk Sleep under Settings, System, Energy Saver. More importantly, the flashing green light should not stop you from watching a video. You mentioned that it slows down, what exactly slows down? Also, what exactly happens when you try to watch a film? Your problem may be more related to your network condition.