False camera is a free virtual webcam or webcam emulator that you can use to show any video file as your webcam feed. When you use this free webcam emulator, you can choose a video file as your webcam feed, and then the applications will broadcast that as your webcam output. This is a fun way if you do not want to share your actual webcam with users in your video chat sessions.
False Camera supports web browser web camera capture plugins like Flash and Silverlight that are used by popular webcam based applications like ChatRoulette.com, omegle.com, and chathopper.com. It will also work with video chat clients, like, Camfrog Video Chat, Gmail Video Chat, and Skype Conference Video Chat.
False Camera virtual webcam supports multiple output streams, so you can have a different output for different webcam based applications simultaneously.
False Camera is a completely free webcam emulator, but it is in alpha stage at time of writing of this article, so use with caution. Another option that you can try meanwhile is Manycam Virtual webcam.