as in like this because right now, my phone is completly different to this :S and im kinda new to this stuff do dont take the mik
What you're looking at there is a
rooted Desire HD, running a custom, non standard ROM. I'm not sure exactly what ROM that is, but that's "vanilla" Android, straight from Google as it would be on a Nexus 1 or Nexus S. HTC put their own overlay on it called Sense, which is why your handset looks different.
In order to get that, you would need to get a
goldcard (if your device is network branded),
downgrade,
Root & get S-OFF, Get
ENG S-OFF, install
ROM Manager, then clockwork (you can install from inside ROM Manager), choose your
ROM, back up your existing one, then flash which ever new one you chose.
There are alternative ways to get the look and feel of vanilla gingerbread without actually doing all that though. There's the
Gingerbread keyboard,
Gingerbread Wallpaper and a
Gingerbread Launcher which should go a long way to giving you the look and feel of Vanilla Gingerbread (similar to what you saw in the video).
Test the alternatives first, see if you like what they offer. Then if you decide you want to root, install a custom ROM etc, make sure you read all the links in the first paragraph, fully understand what you're doing and post here if you have any queries before you start. It's relatively risk free, but there are obviously always risks and by doing even the first step in the process, you've voided your warranty.
Bet thats the easiest question you have answered in a while mate.
Aye, it was at first.
Edit - And Xyro got in there before me again!