A:AnswerI personally don't know if The History channel is a paid app like CBS but if it is, I imagine it would cost the same as any where you can get/download this app. Like CBS Stream, Netflix, Hulu, and all the other paid streaming TV apps, they are all universally priced for which ever streaming device you choose. I hope this helps?
A:AnswerRoku checks for updates to all downloaded apps regularly. Haven't had any problems updating Amazon, Netflix, etc. Don't use hulu but imagine that's fine too.
A:AnswerYou need to be looking into Streaming Services such as Hulu with Live TV, Sling TV, Direct TV Now, Playstation Vue, Youtube TV, or FuboTV. All of which should have Apps on Most of your Popular Streaming devices.
A:AnswerI'm not sure what you're trying to do. My Roku Stick is hooked up to the HDMI for best streaming quality. Are you saying you have an old projection tv? If so you might need a HDMI to RCA Jack adapter.