I'll write this is a doubtful feature. Most camcorders will not run for hours without overheating and shutting down. This isn't a mistake in the design. Its because to make a camcorder to record for 24x7 operation the weight and cost increases. Consumers are not interested in such at the high volumes needed to drive the price down.
Your best bet is to get a cheap webcam. My bet is you need to read the manual and maybe hook it up to firewire.
CNET's review of Sony's PC 330 Digital Handycam indicates that it can be used as a Webcam. My question is, how? The documentation that came with this camera says nothing about this. Does one require some kind of special software? Note that I am connecting the computer to the camera via USB 2.0.
Thanks for any help,