Echo and TV control
I use Harmony 650 remotes with my cord cutting system. 650s don't need a hub.
I bought the remotes before I knew of the Haromy Hub's ability to work with Amazon Alexa and control an entertainment system.
Step 1. Setup the Harmony Hub
Step 2. Enable Harmony Alexa Skill on your SmartPhone
Step 3. Link Alexa and Harmony Hub through the Alexa App
Step 4. Go to Harmony Hub app and add favorite channels
Settings > Harmony Setup > Add/Edit Devices & Activities > Favorites
DirecTV Now does not support voice commands