Playing local recorded video

Question

I just want to record a video, copy it to local storage and be able to replay it. I have tried numerous different solutions. It works fine when debugging on an actual device from VS but as soon as the app is transferred to Apple I only get the red rectangle without content.

XAML:

<xct:MediaElement
  BackgroundColor="red"
  x:Name="mediaElement"
  Source="{Binding Video}" 
  ShowsPlaybackControls="True"
  HeightRequest="400"
  HorizontalOptions="Fill"/>

MVVM:

public async void MoveVideo(FileResult fileResult)
{
  var documentsFolder = GetVideoFolderPath();
  var newFile = Path.Combine(documentsFolder, fileResult.FileName);
  using (var stream = await fileResult.OpenReadAsync())
  using (var newStream = File.OpenWrite(newFile))
    await stream.CopyToAsync(newStream);

  var ex = System.IO.File.Exists(Path.Combine(documentsFolder, fileResult.FileName));        // just to validate - returns true
}

public string GetVideoFolderPath()
{
  var documentsFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
  return documentsFolder;
}

private void CheckVideo() {
  var documentsFolder = _videoService.GetVideoFolderPath();
  var pathAndFile = Path.Combine(documentsFolder, LocalFilePath);
  var b = new System.Uri(pathAndFile).AbsolutePath;
  if(File.Exists(pathAndFile)) 
  {
    Video = MediaSource.FromFile(b);
  }
}

Please note that it works and shows the video when debugging from VS. How can I ensure the playback?

Thanks!