Android - Sending video file (captured by custom camera) to new activity with videoView via intent

I created a custom camera capturing videos. I want to send the video I just capture to a new Activity containing a videoView, via an intent, in order to preview the video before to save it (on my mobile or on a server).

The "PreviewVideoActivity" opens after the recording BUT I don't see anything (only a black or white screen). I don't know if it's because my video is not ready to be displayed or if something is wrong in my intent code... Please heeeelp :)

Here is my code :

In the "TakeVideoActivity" where my custom camera is coded, I call processVideo(videoFile); when I stop recording and here is its code :

public void processVideo(File videoFile) {
        //File videoFile = getOutputMediaFile();
        if (videoFile == null) {
            return;
        }
        try {
            sendToPreviewVideoActivity(videoFile, mContext);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //called whenever a pic is shot or video is recorded
    public void sendToPreviewVideoActivity(File videoFile, Context mContext) {
        System.out.println("sendToPreviewVideoActivity called");
        Uri filePath = Uri.fromFile(videoFile);
        String value= videoFile.getAbsolutePath();
        Intent i = new Intent(this, PreviewVideoActivity.class);
        i.putExtra("file_path", filePath.toString());
        i.putExtra("uploadFilePath", value);
        startActivity(i);
    }

And here is the "PreviewVideoActivity" :

public class PreviewVideoActivity extends ActionBarActivity {

    private VideoView mVideoView;
    private String filePath = null;

    private Uri mVideoUri;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_preview_video);

        mVideoView = (VideoView) findViewById(R.id.video_view);

        // Receiving the data from previous activity
        Intent i = getIntent();

        // image or video path that is captured in previous activity
        filePath = i.getStringExtra("filePath");
        putPreviewVideo(i);
    }
    private void putPreviewVideo(Intent intent) {
        mVideoUri = intent.getData();
        mVideoView.setVideoURI(mVideoUri);
        //mVideoView.setVisibility(View.VISIBLE);
        mVideoView.setZOrderOnTop(true);
        mVideoView.setBackgroundColor(Color.WHITE); // Your color.
        mVideoView.start();
        mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mVideoView.setBackgroundColor(Color.TRANSPARENT);

            }
        });
                //mVideoView.start();

    }
}

Thanks !