anti hotlink module for apache 2

This module needs to compile under linux and freebsd: We are having a problem where users are linking to our videos. The module needs to work in a cluster environment since there is around 10 servers in the cluster so sessions might be something required. Also please take note there will be legitimate and non-legitimate users attempting to save the videos to their hard drive from our site and no referrer information is passed when doing right click and save as on the video or image, so some sort of tracking will need to be done within the module. We dont want to deny legitimate users coming from approved sources being denied the option to save the file while blocking theives. The module also requires a whitelist where all urls within the whitelist will be allowed to link to our videos. All urls must be stored in a database mysql so we may update it on the fly. This module should protect videos and images. All video formats as well: mpg wmv flv mov swf etc. thanks