NewPipe/app/src/main/res/layout/toolbar_layout.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:id="@+id/toolbar_container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        android:gravity="center_vertical"
        android:minHeight="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.ActionBar"
        app:titleTextAppearance="@style/Toolbar.Title">

        <include
            android:id="@+id/toolbar_search_container"
            layout="@layout/toolbar_search_layout"
            android:visibility="gone"
            tools:visibility="visible"/>

    </androidx.appcompat.widget.Toolbar>

</LinearLayout>