title: Unable to download Video file in WebView
body: <p>When I click the link in WebView then video downloading is started but the format of video is unknown, due to which Android is not playing the downloaded video file. 
  Also, when I download the video from the same link in chrome then video download in correct format and android is able to play the video file.</p>
  
  <pre><code>        WebView webview = (WebView) findViewById(R.id.web1);
      webview.setWebViewClient(new WebViewClient());
      webview.loadUrl("my url");
  
      webview.setDownloadListener(new DownloadListener() {
  
  
          @Override
          public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
              DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
              request.allowScanningByMediaScanner();
              request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
              request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Game of thrones ");
              DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
              dm.enqueue(request);
              Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
                      Toast.LENGTH_LONG).show();
  
          }
      });
  </code></pre>