I downloaded the trailer and it looks markedly different to HD,especially in the black level.

Those with a HD screen might want to try changing their "super white" settings on there PS3 from off to on,this will only effect things if you are running HDMI out of the PS3 into your set.
If you do,you might want to check your brightness/contrast levels with a test disc.

Or if you have any SONY Blueray disc [Casino Royale for instance],you can access the test pattens that not many know are on these discs to adjust your screen,look at the bottom right of the colour chat and you will see a black box with three faint Grey lines within it,you want to adjust your screens brightness so that you can only just see two of these bars.

You can access the test pattens by pressing the Triangle button on your controller at the start of the disc,then enter the numbers 7669 quickly into the virtual keyboard,then enter on the V/K,the test patten will then appear.