Thanks so very much for your effort on my behalf. But, sorry, I don't get your suggestions-- beyond me until I can find someone's kid more tech savvy than I am to help me understand and follow your instructions.
My Roku YouTube account access came/left a couple of times spontaneously soon after I first wrote, then stayed connected. Now doesn't work again. There was someplace on the Roku screen on my tv where I was able to report that the connection to my YouTube account wasn't working, but I don't see that anywhere now.
I get YouTube, but not my account, so no editing for what I ordinarily watch, subscriptions, or watch history, just the main home page. Roku says sign in to YouTube account. I try, but it won't accept password that I know is accurate for YouTube account-works on computer, tablet, smart phone.
I don't want to bother you with asking for something that only has solutions that I can't figure out how to pursue. It's too bad Roku has no customer service. Again, I'm very grateful for your efforts.