You can restrict access to view your videos by geographic location or IP address, this includes preview links.
Note that these restrictions do not affect viewing media in the Console, and that the Account wide setting also affects any videosite connected to your account.
To protect your videos by Geolocking and IP range, go to Settings > Security and fill in which countries you want your video to be available in or which IP ranges should be able to access your videos.
Setup protections for individual media by entering which countries or IP-addresses that you want your video to be available from under the Security tab of the specific media. This setting will override the account wide settings.