I just answered this question in depth so I thought I would post it here for all of you. This is exactly the process and what is needed to make walk on the screen videos for your sites:
This is actually very easy if you have the right equipment and software. Here is a list of things you will need:
1. A green screen set. Mine is a wall painted the right color of green, you could also hang a piece of green material on the ceiling to make this work. For information on the right color to use, do a Google search for Chroma Key and you will get reams of information about this.
2. Any common video camera, the ones with the DV port are best because you can capture professional audio at the same time with a simple cheap microphone.
3. A software program that will allow you to add a background behind you. There are a lot of these out there and they can be very expensive. For our purposes as Realtors the best and cheapest I have found is Vlogit. Not sure of the URL just type Vlog it into Google, it is like $40.
4. Then you need a way to encode the video and upload it onto your site. You could use FLV producer Lite for this. Our system at BusyAgentPro.com includes an encoder and a way to place it on all of your sites, etc.
That is really it, now the actual process is easy, here are the steps:
1. You stand behind the green screen and when you are ready to start the video just walk out from behind the screen, look at the camera and record your video. I use a monitor behind my camera as a teleprompter. You can find free teleprompter software all over the net.
2. Upload your video from your camera to your computer.
3. Load it into your VlogIt software or whatever else you are using. Make any edits you need here.
4. Replace the green screen with any color background you would like. If you want to make it look like you have no background just choose the same background color as whatever site you are posting the video on, or you can give it a transparent background.
5. Save the file and post it wherever you like
That's it in a nutshell, it really is pretty easy with the right equipment and software.
Here is an example that a friend of mine did using this exact formula. Obviously the more time and effort you put into it the better your video will be. www.thepodcastbootcamp.com
If you have any questions, feel free to post them or drop me a line:)