Have you ever tried setting up kodi before?
It's easy to use on any desktop or mobile, might be a bit difficult on iphone or you can easily set it up on an sbc using a system like librelec.
It will make everything easier to managein the long run if you're a serious movie fan, and safer than trying to split tunnel your connection on a desktop or mobile. Also less hassle. I used to have an android box as a service and it was such headache constantly trying to reconfigure or replace replace streams.
I can recommend OSMC and use that but if you're just going to be watching films haven't used libreelec but heard good things about it.