I just received this email:
The YouTube TV app is available in the Roku Channel Store
We have good news: The YouTube TV app is back in the Roku Channel Store. A few months ago, we let you know that our agreement with Roku had expired and that the app would not be available for new downloads in the store.
Today, we are happy to share that we have since reached a deal with Roku to continue distributing the YouTube and YouTube TV apps on Roku devices. This means the YouTube TV app is once again available in the Roku Channel Store for both new and existing members. You will still have the option to access YouTube TV via the YouTube app if you would like.
Thanks for being a YouTube TV member.
The YouTube TV team