мое приложение WebView не может воспроизводить видео в формате mp4, встроенные в мой веб-сайт Moodle

Question

Я пробовал другие приложения для воспроизведения тех же видео, и эти приложения воспроизводились нормально. Только мое приложение Webview не воспроизводит видео, оно показывает черное видео, как изображение с символом воспроизведения, которое не воспроизводится и не перемещается.

**Below is my code:**

**Manifest.xml**

<?xml version="1.0" encoding="utf-8"?>
<manifest 
xmlns:android="http://schemas.android.com/apk/res/android"
package="abc.co.za">

<uses-permission android:name="android.permission.INTERNET"/>



<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category 
android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>



**MainActivity.java**

public class MainActivity extends AppCompatActivity {

ProgressBar superProgressBar;
ImageView superImageView;
WebView superWebView;
LinearLayout superLinearLayout; //we will use it to access the 
LinearLayout hosting the menu items
SwipeRefreshLayout superSwipeLayout;// layout for refreshing the 
page when you swipe on your phone
String myCurrentUrl; //Url used by Share It menu item

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


    //initializing our variables
    superProgressBar = 
(ProgressBar)findViewById(R.id.myProgressBar);
    superImageView = (ImageView)findViewById(R.id.myImageView);
    superWebView = (WebView)findViewById(R.id.myWebView);
    superLinearLayout = 
(LinearLayout)findViewById(R.id.myLinearLayout);
    superSwipeLayout = 
(SwipeRefreshLayout)findViewById(R.id.mySwipeLayout);

    //add Progress bar and set the maximum count from zero
    //it starts to count the load progress from zero to hundred
    superProgressBar.setMax(100);

    // WebView

superWebView.loadUrl ("https://asifunde.co.za/asifunde/login/index.php «); // и URL целевой страницы superWebView.getSettings (). setJavaScriptEnabled (true); // включить javascript загрузка в браузер superWebView.setWebViewClient (new WebViewClient () {// установка разрешения на использование клиента WebView (ie с помощью браузера)

        @Override //when the page is loading the progress bar and favicon should be visible
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            superLinearLayout.setVisibility(View.VISIBLE);
            super.onPageStarted(view, url, favicon);
        }

        @Override //when the page has finished loading  the progress bar and favicon  should disappear
        public void onPageFinished(WebView view, String url) {
            superLinearLayout.setVisibility(View.GONE);
            superSwipeLayout.setRefreshing(false);//prevents the refreshing spinner fron running forever
            super.onPageFinished(view, url);
            myCurrentUrl = url;
        }
    });




    superWebView.setWebChromeClient(new WebChromeClient(){ //setting chrome as the default browser


        @Override
        public void onProgressChanged(WebView view, int newProgress) {//get new progress bar on chrome
            super.onProgressChanged(view, newProgress);
            superProgressBar.setProgress(newProgress);
        }

        @Override
        public void onReceivedTitle(WebView view, String title) {//set title on the action bar
            super.onReceivedTitle(view, title);
            getSupportActionBar().setTitle(title);
        }

        @Override
        public void onReceivedIcon(WebView view, Bitmap icon) {//set the imageView
            super.onReceivedIcon(view, icon);
            superImageView.setImageBitmap(icon);
        }
    });



    //calling swipelayout to refresh the web page when swiped using your fingers
  superSwipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            superWebView.reload(); //reload or refresh the webview element. Top of he page in this app

        }
    });

}


//Creating option menu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater menuInflater = getMenuInflater(); //inflating the menu
    menuInflater.inflate(R.menu.super_menu, menu);
    return super.onCreateOptionsMenu(menu);
}

@Override //add onclick listener for each of the menu items
public boolean onOptionsItemSelected(MenuItem item) {

      switch (item.getItemId()){//switch statement for getting the menu items IDs

          case R.id.menu_back:
              onBackPressed();
              break;

          case R.id.menu_forward:
              onForwardPressed();
              break;

          case R.id.menu_refresh:
              superWebView.reload();
              break;

          case R.id.menu_share: //this invokes the share it menu item
              Intent shareIntent = new Intent(Intent.ACTION_SEND);
              shareIntent.setType("text/plain");
              shareIntent.putExtra(Intent.EXTRA_TEXT,"https://play.google.com/store/apps/details?id=abcd"); //here you can put the url of APP playstore
              shareIntent.putExtra(Intent.EXTRA_SUBJECT,"ABC Playstore Link");
              startActivity(Intent.createChooser(shareIntent,"Share ABC Playstore URL"));

}

    return super.onOptionsItemSelected(item);
}

//our custom menu to handle forward button click
private void onForwardPressed(){

    if(superWebView.canGoForward()){
         superWebView.goForward();
    }else{

        Toast.makeText(this,"Can't go further!",Toast.LENGTH_SHORT).show();
    }


}


//setting the back button to go to the previous page
@Override
public void onBackPressed() {
   if(superWebView.canGoBack()){
       superWebView.goBack();

   }else {

       finish(); // destroys the current activity
   }



}

}

**activity_main.xml**

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<LinearLayout
    android:id="@+id/myLinearLayout"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="30dp">

    <ProgressBar
        android:id="@+id/myProgressBar"
        android:layout_weight="0.1"
        style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ImageView
        android:id="@+id/myImageView"
        android:src="@mipmap/ic_launcher"
        android:layout_weight="0.9"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>


</LinearLayout>

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/mySwipeLayout">

<WebView
    android:id="@+id/myWebView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

</LinearLayout>


**Code for the video on my website**

<div class="video-container">

<iframe src="https://drive.google.com/file/d/abcdujhfhdfhg/preview" 
scrolling="no" seamless="" width="640" height="480" 
frameborder="0"></iframe>

<div style="width: 80px; height: 80px; position: absolute; opacity: 
0; right: 0px; top: 0px;"></div>