Anyone know much about webcams?

[Nymph]

I am looking for a new one, and have seen some used on sites that is like a pic in a pic. Big one shows face, and smaller one assorted other goodies. I have tried to get info from the ones using them, and they are either flat out ignoring me, or don't speak English.

I was wondering if anyone here has seen what I'm talking about, or better yet, know how I can do it/ buy one.

Thanks y'all
Nymph