So you're asking for something that will let you watch a video on your phone, connected to your computer? And the computer hasnt downloaded the file all the way yet? The only way to do that is to set up your computer as a server. You would need to make a code for the front end that communicates with the phone, and accepts commands from the phone. Then you will need a back end code to encode the video on-the-fly to h264. And of course you will need to develop an app for the android to interface with this.
