Pick your choice from http://www.google.com/search?q=convert+mov+avi.
But - if it's shareware - use it in trial mode (unpaid) until you know it handles your video's well.
If you post the make and model of your video camera it's possible somebody could give a more specific advice.
The files I downloaded from my video camera have a .mov format but will not play on anything I have on the computer. Can I change the format, as I would like to copy them onto a CD/DVD to send to family