Queue structure in unity

Unity Engine
1

Hi,
I have 5 panels which dispaying videos. How to make queue of actions where action is something like this:

//VideoController
public void OnOpenVideoFile()
{
  _mediaPlayer.m_VideoPath = System.IO.Path.Combine(_folder, _videoFiles[_VideoIndex]);
  _VideoIndex = (_VideoIndex + 1) % (_videoFiles.Length);
  if (string.IsNullOrEmpty(_mediaPlayer.m_VideoPath))
  {
       _mediaPlayer.CloseVideo();
       _VideoIndex = 0;
  }
  else
  {
       _mediaPlayer.OpenVideoFromFile(MediaPlayer.FileLocation.RelativeToStreamingAssetsFolder,                _mediaPlayer.m_VideoPath, false);

   }
}

To add item to queue:

//Controller

private Queue<VideoController>   m_VideoControllers = new Queue<VideoController>();
void Start()
{
   m_VideoControllers.Enqueue(newVideoController1);
   m_VideoControllers.Enqueue(newVideoController2);
}

My queuing mechanism:

 void Update()
{
      if (m_VideoControllers.Count > 0 && !isBlocked)
            {
                loadingBar.SetActive(true);

                isBlocked = true;
                var item = m_VideoControllers.Dequeue();
                StartCoroutine(WaitForOpenVideo(item));
                item.OnOpenVideoFile();

            }
            else
            {
                if (m_VideoControllers.Count == 0 && !isBlocked )
                    loadingBar.SetActive(false);
                       
            }
}

private IEnumerator WaitForOpenVideo(VideoController item)
{
      do {
          if (item._mediaPlayer.Control.CanPlay())
              isBlocked = false;
               yield return null;
          } while (isBlocked);
}

After few secund, will be loaded new videos.
What is the best way to implement queuing mechanism?
How can I improve my code?

2

Any ideas?