11. The method of claim 4 , further comprising: in response to a request to retrieve a multimedia document from among the plurality of multimedia documents stored in the storage, performing a content-based search on multimedia annotations of the plurality of multimedia documents for the requested multimedia document within the storage based on content of the multimedia annotation associated with the requested multimedia document.
14. The method of claim 11 , wherein the content-based search is performed on a video clip of the multimedia annotation based on an image of the user using face recognition techniques.