Copy paste VideoView
from Android sources and comment out these lines:
AudioManager am = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
am.requestAudioFocus(null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
You could name the new class MutedVideoView
, for example.
gist here: https://gist.github.com/vishna/7e9d3466bced8502fcdd