Here is a product recommendation. One of the most difficult aspects of creating your own video is the sound. For example, if you are collecting material in a classroom setting, you will find that the sound carries the most useful information and is also most difficult to capture.
A wireless mike (a remote mike the sends a signal back to a receiver connected to your camera) helps a great deal. We have good luck with the Sony WCS-999. Search online and you should be able to find this product for $100.
