I have looked at many videos on live streaming but none says how you go about notifying the people who you would like to view your live stream. So let's say that I have 20 specific people whose email addresses I have and I want to notify them that I will be hosting a Livestream on May 3, 2:00pm EDT. And let's say that I will be using Youtube. Don't I need to send an email to the 20 people today and in it have a URL that they click on May 3 at 2:00pm. How do I know what that URL will be (I don't even know if that's the right question to ask.)