Use Like this:
Uri uri = Uri.parse(URL); //Declare your url here.
VideoView mVideoView = (VideoView)findViewById(R.id.videoview)
mVideoView.setMediaController(new MediaController(this));
mVideoView.setVideoURI(uri);
mVideoView.requestFocus();
mVideoView.start();
Another Method:
String LINK = "type_here_the_link";
VideoView mVideoView = (VideoView) findViewById(R.id.videoview);
MediaController mc = new MediaController(this);
mc.setAnchorView(videoView);
mc.setMediaPlayer(videoView);
Uri video = Uri.parse(LINK);
mVideoView.setMediaController(mc);
mVideoView.setVideoURI(video);
mVideoView.start();
If you are getting this error Couldn't open file on client side, trying server side Error in Android. and also Refer this. Hope this will give you some solution.