Unless the company has developed an on-board channel/app for the ATV iOS, you'd have to jailbreak your Apple TV, and that's also assuming someone has developed an unofficial version of the stream
The Apple TV is limited on what you can have on it, and is not as open as the mobile iOS platform where you have a plethora of apps that you can purchase and install. Alternatively, you can AirPlay from your computer/laptop to our Apple TV to stream, which still requires another device connected to your AppleTV
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