Method for storing, transporting and using user media preferences information

An end user media preferences "key" captures an end user's personal media interests and tastes in a unique display format that is saved locally to an end user's computer. As the end user navigates to different web sites having media discovery applications and services, he or she uses the key to facilitate a media discovery process on such sites. In this manner, the key captures, carries and controls access to the end user's personal interests and tastes across multiple sites. On a given site, the key is used (by a local media discovery platform or process) to help match video, audio or other textual content with the end user based on the preference information that has been collected and embedded in the key. Upon receiving the key, the local media discovery platform or process immediately learns what the end user likes and can then locate the movies, video, news or other content that the end user would otherwise have to locate directly or via site-specific entry and processing of end user preference data.