{Code for Form 1}

uses Unit2;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Form2.Show;
  Form2.WindowState := wsMaximized;
  Form2.MediaPlayer1.Notify := false;
  Form2.MediaPlayer1.Display := Form2.Panel1;
  Form2.MediaPlayer1.FileName := 'C:\TheWall\DELCAR2.AVI';
  Form2.MediaPlayer1.Open;
  Form2.MediaPlayer1.DisplayRect := Form2.ClientRect;
  Form2.MediaPlayer1.Play;
end;

{Code for Form 2}

procedure TForm2.MediaPlayer1Notify(Sender: TObject);
begin
  if MediaPlayer1.NotifyValue = nvSuccessful then
    Form2.Close;
end;