TimelineController Tutorial Script Broken

Maybe since the update

https://unity3d.com/learn/tutorials/topics/animation/using-timeline-custom-scripts

But this tutorial's script labeled "TimelineController" has several errors.

System.collections.GenericList<T> requires '1' type arguement (s)
and
Enumerator issue where "foreach" is present.

Below is the script copied from the tutorial:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.Timeline;

public class TimelineController : MonoBehaviour {

public List playableDirectors;
public List timelines;


public void Play()
{
foreach (PlayableDirector playableDirector in playableDirectors)
{
playableDirector.Play ();
}
}

public void PlayFromTimelines(int index)
{
TimelineAsset selectedAsset;

if (timelines.Count <= index)
{
selectedAsset = timelines [timelines.Count - 1];
}
else
{
selectedAsset = timelines [index];
}

playableDirectors [0].Play (selectedAsset);
}
}

 

Should be this instead:
public List<PlayableDirector> playableDirectors;
public List<TimelineAsset> timelines;