You can play classes on your TV using either Chromecast or Apple Airplay. Here are instructions on how to do so:
CHROMECAST
Play classes from your computer or mobile device to your TV using your Chromecast device (you must already have a Chromecast device hooked up to your TV)
From your computer:
1. On your computer, open the Chrome browser and navigate to your class on YogaDownload.com
2. Start your class and then click on the cast button at the lower right of the video player
From your mobile device:
1. On your phone or mobile device, navigate to your class on the YogaDownload.com site or app
2. Swipe down with two fingers from the top of the screen on your phone or mobile device and select the Cast icon, and then select the TV you would like to cast to.
For more info visit Chromecast support.
AIRPLAY
Play classes from your Mac computer or iOS device to your TV using your Apple Airplay (you must have a Mac computer or iOS device and an Apple TV)
From your computer:
1. In an internet browser navigate to your class on YogaDownload.com
2. On your Mac, click the AirPlay icon 
in the Mac menu bar, then choose the name of the Apple TV you want to use.
From your iOS mobile device:
1. On your iPhone or other iOS mobile device, navigate to your class on the YogaDownload.com site or app
2. On the device, swipe to open Control Center, tap , then select Apple TV in the list of AirPlay devices.
For more info visit AirPlay support