Using Airplay, you can cast an events from an Apple phone, tablet or from an Apple computer directly to your TV or Airplay enabled device.
Connect your computer and Airplay enabled device to the same wireless network.
Go to https://onair.events using Safari.
Login and go to the event you want to watch
When the event is live, Click the AirPlay Video icon near the top right corner of the video player.
Under 'Connect to a device', select your AirPlay-enabled device from the device list.
Video quality may appear poor at first. This is expected and will improve as you watch.