Answer by Vishnu Priyaa for MediaController positioning over VideoView

Put your video view inside a linear layout

<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="com.example.hp.videoplayer.MainActivity">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <VideoView
            android:layout_width="300dp"
            android:layout_height="180dp"
            android:id="@+id/player"
            android:layout_marginTop="40dp"
            android:layout_centerHorizontal="true"/>

    </LinearLayout>

</RelativeLayout>