It's simple. Through WebHooks, you can be notified of any activity within your channel.
Want to know if your user completed watching the video? Give us a URL in the textbox you see above and we will send the information of the video activity to that URL. On your end you can code the information from the URL and use it.
Are you a developer? Read more about using WebHooks here.
You can also choose to limit the number of IPs from which your users can log in to your channel. Learn how to set the limit here.