How to avoid showing in a webview the blank page that contains a video?

I am interested in showing only the video of a url by webview and I would like to get rid of the blank page, which appears when leaving the video in fullscreen.

DO NOT USE <iframe> to show the video. Is there any way? I leave you photo of the problem

Thanks in advance.

Then I add my code:

WebViewActivity.java

    private VideoEnabledWebView webView;
    private VideoEnabledWebChromeClient webChromeClient;

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

        Bundle b = getIntent().getExtras();
        View nonVideoLayout = findViewById (R.id.nonVideoLayout);
        ViewGroup videoLayout = (ViewGroup) findViewById (R.id.videoLayout);
        View loadingView = getLayoutInflater().inflate(R.layout.view_loading_video, null);
        webView = (VideoEnabledWebView) findViewById (R.id.webView);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            webView.getSettings().setMediaPlaybackRequiresUserGesture(false);
            getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }

webChromeClient = new VideoEnabledWebChromeClient(nonVideoLayout, videoLayout, loadingView, webView)
        {
            @Override
            public void onProgressChanged(WebView view, int progress)
            {
                // TODO
            }
        };
        webChromeClient.setOnToggledFullscreen(new VideoEnabledWebChromeClient.ToggledFullscreenCallback() {
            @Override
            public void toggledFullscreen(boolean fullscreen) {
                if (fullscreen) {
                    WindowManager.LayoutParams attrs = getWindow().getAttributes();
                    attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
                    attrs.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
                    getWindow().setAttributes(attrs);
                    if (Build.VERSION.SDK_INT >= 14) {
                        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                                WindowManager.LayoutParams.FLAG_FULLSCREEN);
                    }
                } else {
                    if (Build.VERSION.SDK_INT >= 14) {
                        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
                    }
                }
            }
        });

        webView.setWebChromeClient(webChromeClient);

        if (urlConElVideo != null) {
            webView.loadUrl(urlConElVideo);}

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
            webView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }