If you want to search for open webcams, here is a simple trick.
You only have to Google any of the terms below. Google will return any open webcam. Note that this is not a "hack", these webcams have been found automatically on the net, maybe because some cam owners simply forgot to secure them.
inurl:"view/indexFrame.shtml"
inurl:"view/index.shtml"
inurl:axis camera
inurl:"live view / - axis"
inurl:/home/homeJ.html
inurl:sample/LvAppl/
inurl:/control/userimage.html