Question about iTunes/MoviesAnywhere.

[A Sith Lord?]

So here is my situation:

I have an Apple4KTV. My brother has a MA account and I've been buying him codes from the buy/sell/trade sub here for my nieces. The APTV is easy enough for my dad to use, so I just have MA for it and it's in my brother's log in.

Meanwhile, I've been buying 4K iTunes codes for my own collection and buying 4kmovies from iTunes store.

I've noticed there are movies that don't redeem in iTunes store, and I've had to use FoxRedeem to get the iTunes code. There are movies I want to buy from studios like Warner that require me to get MoviesAnywhere. Is there anyway I can get the iTunes code for these like using FoxRedeem or do I need to get MoviesAnywhere? I like having all my movies in my AppleTV library without having to go to an app like MA to see them.

I also don't wanna redeem these movies to my bro's MA account because his MA account just has nothing btu Disney and Pixar movies, and I don't wanna mix them up with movies like Sicario or It.

I'd rather just keep the MA app on the TV just for his account for the kids, and have all my movies in my iTunes Movies' Library.

If I make my own MA account and link it to my iTunes account, do I have to be logged in on the APTV for it to show my movies in the iTunes Movies section?