On demand (movies specifically) used to work on my V6 a few months ago. I'm not aware of changing the Video output settings in that time, but for the last few weeks I have been aware that when attempting to play any movie preview it would show the progress bar (at 0sec) but otherwise would be a blank screen.
From a VM message that popped up today suggesting setting video output to 1080p, I did that and it then worked.
My TV supports all the video output modes, but if either 2160p option is selected then on demand does not work.
Is this a known issue that means 2160p is not supported for on demand? (Doesn't even scale up) Will it be fixed in a later update to the box?