2.3 Update: Problem with AppleTV learnin… Apple Community. This worked perfectly. I used code 20533 for AV1, then went through the AppleTV Learn Remote menu. Be sure to set the Playback Keys as well as the Basic Keys. I did run out of navigation buttons on the DTV remote, and had to use.

2.3 Update: Problem with AppleTV learnin… Apple Community
2.3 Update: Problem with AppleTV learnin… Apple Community from i.insider.com

Apple TV. You can use a supported TV or receiver remote, a network-based remote for home-control systems, or an infrared remote (commonly known as a universal remote) to control Apple TV. If your TV or receiver supports HDMI-CEC, Apple TV uses the HDMI connection to allow it to be controlled by your TV or receiver remote…