I use Youtube on deck in Firefox with youtube.com/tv in kiosk mode. Works really well, but I noticed even when I have a bigger screen connected I can only watch videos in up to 720p. It doesn't let me select anything higher. Is that a YTTV thing or is there a problem in my setup?
Not to be snarky, but welcome to the true frustrations against corporations. They view linux users (like you now) as pirating monsters, and in their eyes giving us even 1080 means that they're giving their content over to pirates. Which is ironic because I think that sort of behavior encourages pirating.
So it's nothing you did, nothing is broken, it's functioning as Netflix wants it to. It'll be the same with all of the other providers.
You're right, subbed in Netflix for some reason - but Youtube TV though acts in the same way, I don't believe they allow anything > 720. Free youtube is different, paid Youtube TV will throttle