Abstract[0078] This invention is directed to playing back streamed media items using an electronic device. In particular, this is directed to locally storing one or

5 more clips corresponding to a media item such that the clips can be immediately played back in response to a user request to play back the media item. While the clips are played back, the electronic device can retrieve the remaining segments of the media item from

10 the user's media library as a media stream over a communications network. Once the playback of the clip is complete, the electronic device can seamlessly switch playback to the media stream received from the user's library. The electronic device can authenticate

15 with the remote library using any suitable approach, including for example one or more passwords and tokens.

reference sited ..WO 2008/088338....PCT/US2007/001441.....link

PREFIX CACHING ASSISTED QUALITY OF SERVICE AWARE PEER-TO-PEER
VIDEO-ON-DEMAND

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