You need to login because accounts have different quality tiers (standard vs high definition) and different max concurrent user counts. Hulu does this much bet

You need to login because accounts have different quality tiers (standard vs high definition) and different max concurrent user counts. Hulu does this much better though. They display a hulu.com shortlink on the TV app that you type into your browser on a computer, login if you aren't already, and click a button to authorise the TV.