I have a webcam built in my computer but i dont know how to take a video with it! help please!
To take a video from a webcam, you must first ensure that you have installed an app like Yawcam. From there, go to start menu, all programs and then select available app. You will be required to click on the start video capture command to take a video. Go to http://www.microsoft.com/hardware/en-us/help/support/how-to/webcam/create for more details.
What kind of computer?
If you have Windows 7, it comes with a movie maker that will allow you to record video with your webcam.
if you have HP Touch smart go on a gray button with a house on it and click that then it will bring you to a page with a whole bunch of options click webcam and there you go
If you have an Apple product, search for Photo Booth. Videos taken by Photo Booth aren't the best, but its better than nothing.