I watch YouTube through my YouTube Branded account (I am a YT content creator). All of the subscribed channels that I watch are on my YT Branded account. When I access the YouTube app on my new TCL TV, I sign in using my Google account, but that does not get me over to my branded account where I have everything saved. Take a look at the attached screen shot from YouTube. It shows my Google (gmail) account that I log in through. And it also shows my branded account. But I cannot access the branded account in Roku.
I know this works because I can view YT through my branded account on my Apple TV in the other room. In fact, Apple TV asks me "How do you want to view YouTube" and gives me the choice of either the Google (gmail) account, or the branded account. I always select the branded account. How do I do this on my Roku TV?
Thanks for the post.
For more information about that channel's features and functionality, you'll want to contact YouTube support directly to inquire further. Many channels on Roku are developed and maintained by the channel provider themselves.
You can reach YouTube support here: https://support.google.com/youtube/?hl=en#topic=9257498
Thanks,
Danny