static void Main(string[] args)
{
var video = new Video()
{
Title = "Video 1"
};
var videoEncoder = new VideoEncoder(); //publisher
var mailService = new MailService(); //subscriber
var messageService = new MessageService(); //subscriber
videoEncoder.RegisterEvent(mailService.OnVideoEncoded);
videoEncoder.RegisterEvent(messageService.OnVideoEncoded);
videoEncoder.Encode(video);
Console.ReadLine();
}