http://www.asianic.com.ph/product/a4tech-pk770k

Camorama didn't detect it but the message said something like "no device in /deb/..."

Then I went to VLC, which has video capture, and I entered /deb/... (I don't remember the rest) in video device and it worked.

Please excuse me for my lack of additional information, I'll post the results of further tests as soon as possible.

Robert