Tick the 'Domain Lock' check box to restrict the accessibility of a movie to a specific domain. Then enter the domain's address.
The Domain Lock prevents a movie from being hosted on a domain other than what's specified in this field. If a user tries to access the movie on a domain other than the one specified, the flash movie will display a message with the 'Display Text' option, or it will redirect the user to a web page specified in the 'Redirect option'.
Note: This option is only available for movies exported in Flash, H264 or HTML5 format.