Build a video player How?

I need to make a video player that will show whatever is being broadcast live using my account at . I am reading something at this web site ( but I can’t figure out how to do it.
Here is how it works.I have an account at and I set up an app on my computer to broadcast everything is going on on my web camera. I need my player to display it to whoever is using my app.

Can anyone please help me?