LibreTube/app/src/main/res/xml/activity_main_scene.xml

<?xml version="1.0" encoding="utf-8"?>
<MotionScene xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:motion="http://schemas.android.com/apk/res-auto">

    <Transition
        motion:constraintSetEnd="@+id/end"
        motion:constraintSetStart="@id/start"
        motion:duration="10"
        motion:layoutDuringTransition="honorRequest">
        <KeyFrameSet>
            <KeyAttribute
                android:translationY="0dp"
                motion:framePosition="0"
                motion:motionTarget="@+id/bottomNav" />
            <KeyAttribute
                android:translationY="55dp"
                motion:framePosition="75"
                motion:motionTarget="@+id/bottomNav" />
            <KeyAttribute
                android:scaleY="1"
                motion:framePosition="50"
                motion:motionTarget="@+id/container" />
            <KeyAttribute
                android:translationY="-80dp"
                motion:framePosition="100"
                motion:motionTarget="@+id/container" />
        </KeyFrameSet>
    </Transition>

    <ConstraintSet android:id="@+id/start"></ConstraintSet>

    <ConstraintSet android:id="@+id/end"></ConstraintSet>
</MotionScene>