Mastodon can help you with the first part - you own the server and all the data on it. AFAIK there's no encryption of data at rest so you'd need to add that, but if you own the server it's less of a concern.
Game consoles don't ship with TV remotes, and the remotes that you can buy are overly complicated affairs.
The WAF of using a controller to control video playback is low. We have a Roku 3 and it's far simpler to use than our 360 or PS4. Plus it's never "off". Side benefit is that I can remote play the PS4 when someone is using the Roku ;-).
The Switch could plausibly fill this gap, but I guarantee that those little controller thingies are going to get lost.