Check it out in the Unity3D Asset Store
This package allows users from getting the webcam input on web from flash giving the possibilities to build AR, video chatting, face recognition and all other camera input based applications. Through a monobehaviour based class which you can drag and drop it to any gameobject and then getting camera input without even typing a single line of code, the package comes with a webtemplate that is fully configured with the flash movie as well as you can call methods like connect, disconnect and currentframe. Also make sure to read the Readme.txt file for exact information of how to use it