How to change video colour??

Cheaply, you can mess with color correction options in your editing software. If you want something a little more direct, Magic Bullet looks is very powerful and has plenty of presets to get you started.

Try decreasing the blue and increasing the red and green shadows colour balance, all very slightly. Then blend in a little bit of sepia and add a light gaussian blur and you should be in the general area.

Magic Bullet Looks will definitely get you there, but the price tag might scare you off. There is a free version available that may do the trick, but not if you are using Vegas :-(

If you're using Vegas you really don't need Magic Bullet Looks. Using the Color Correction tool, the Secondary Color Corrector and Curves should give you all the control you'll need.

There's some really good information regarding color correction here, too:

http://www.thefilmbakery.com/blog/the-secret-world-of-colour-correction

Jack