How does video streaming work in Android?

Although I have not tried this, but according to the network it works

VideoView videoView = (VideoView) findViewById(R.id.surface_view);
MediaController mc = new MediaController(this);
mc.setAnchorView(videoView);
mc.setMediaPlayer(videoView);
Uri video = Uri.parse(URL);
videoView.setMediaController(mc);
videoView.setVideoURI(video);
videoView.start();