The guys over at AussieXbox played a game a game of NBA Live 06 at the 'EA Imagine 2005' and taped it.
Here's the link: EA Imagine 2005 -
NBA Live 2006 Hands on Gameplay Video
You need to register to download it, but it only takes 3 seconds...
It's from a camera, so it's shaky, blurry and rather messy. It's hard to see what's going on really, but whatever.
The one thing that you could tell was that the game speed seems way turned up. It's basically a run-and-gun game.
Also, it’s not the best video we've seen

It's similar to that old 'Lakers vs Pistons' one in many ways..