I’ve been using OSMC on RPi4 for a while and i’m tired on trying to guess which 4k file will i be able to play on it when downloading movies, as I don’t really understand all the differences and don’t have enough free time to learn them.
If I buy Vero 4K+, will I be able to play anything without such issues?
If you already have the drive connected to a Pi4 and shared via NFS then just leave it and mount it on the Vero via NFS. You can use Kodi mounts, or better use system mounts (fstab or autofs). If you already have a shared MySQL database then it will probably just work.
USB3 standard allows more current being drawn from the host, that is one of the reasons you often need a new power supply when upgrading from pi3 to pi4. Verok4k confirms with the USB2 standard, and can have a 2,5" hdd powered, but depending on among others things, drive specs, it isn’t guaranteed. That is why we keep saying get an externally powered drive or powered usb-hub, to make sure that power isn’t an issue.