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Roku’s Ultimatum: Surrender Jury Trial Rights or Lose Access to Your TVs
(programming.dev)
This is a most excellent place for technology news and articles.
I believe it is possible by simply attach a rooted device to the TV with streaming capability, like a computer, or a rooted nvidia shield.
Although I don't agree with OP that everything needs to be rooted, for example, my phone runs grapheneos without root, I do believe most rooted OS are more usable than proprietary OS like Roku.