The apparatus 2 wherein the server computing device is configured to use RTSP and RTP protocols to transmit the virtual file that plays the second advertisement portion in response to a request to skip {HEAD ~ the second advertising portion} of {TAIL ~ the digital file} 
The apparatus 2 wherein the server computing device is configured to use RTSP and RTP protocols to transmit the virtual file that plays the second advertisement portion in response to a request to skip { HEAD ~ the second advertising portion } of { TAIL ~ the digital file }
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