Go to the schedule page. If you don’t know which channel the program you want to watch originally aired on, that’s fine. Either schedule page will work.
On the right side of the screen search for the show name. Or just a part of the show name, if that’s all you know.
Find the show you want to watch and click view.
It will open in a new window.
Click the play arrow and you’re all set.
You can also click the full screen icon in the lower right of the video player to make the video full screen.