Well, everyone has the right to use nanny cams, security cameras and such in their homes. The legality comes in with sound. You will not find any store, restaurant, tavern, or other public places that have cameras in use, that record sound. Many have cameras in their homes, but use them for a specific purpose. I don't know why you would want to videotape your guest.
No it is actually illegal to do that.
No but there r restions on where th cameras can be placed no bathrooms or bed rooms I think that's the rule