VideoView

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

android:screenOrientation=”landscape” android:theme=”@style/Theme.AppCompat.NoActionBar”

<RelativeLayout 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"
    tools:context=".MainActivity">


    <VideoView android:id="@+id/videoView"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    </VideoView>

</RelativeLayout>

public class MainActivity extends AppCompatActivity {

    private VideoView videoView;
    private MediaController mediaController;
    private String videoURL = "영상 주소";

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

        videoView = findViewById(R.id.videoView);
        mediaController = new MediaController(this);
        mediaController.setAnchorView(videoView);
        Uri uri = Uri.parse(videoURL);
        videoView.setMediaController(mediaController);
        videoView.setVideoURI(uri);
        videoView.start();
    }
}

안드로이드 앱 만들기 #32 동영상 풀화면 재생 (VideoView)
https://www.youtube.com/watch?v=OBY1jDXF8QE