Here’s a great tutorial by Stu Maschwitz about Magic Bullet’s easy to use Mojo colour treatment software which can give your video more “Hollywood” look. I’ve been using Mojo’s sister software Magic Bullet Looks for a while now and can recommend the company. While I would personally draw the line at using this on live hard news videos, I think for some feature work it is acceptable and can really enhance the feel of a piece. Indeed, quite extreme colour grading is seen in television documentary all the time.
If you are going to use colour grading software on your DSLR please remember to dial back the in camera saturation, sharpness and contrast settings using Picture Profiles to get the best results, I would recommend you do this all the time but I know a lot of news shooters don’t as they worry more about speed. Here’s another good tutorial by a guy called Luka on the subject.