For itunes movies you will need Shiki.kext (they work for me so I don't need it) but this kext is specifically for stuff like that.
kext is mentioned at bottom of this post:
https://www.tonymacx86.com/threads/nvidia-update-simple-way-to-install-nvidia-web-drivers.244987/
get the newest release version from the github. then under "custom flags" in clover boot menu add "shikigva=12" (without quotes) after that it should work for itunes
To hide the wrong partitions use clover configurator. Download it from link in my guide and mount your EFI partition from your mac install. Then open your config.plist file with clover configurator and go to the "GUI" section on the left. Under "Hide Volume" section add "Preboot" (without quotes) also can add "Recovery" (to hide that partition too). Also uncheck the legacy box to hide any other hard drives that dont have bootable partitions.