Moto Z2 Play has protection against water. It comes with water repellent nano-coating.
Yes, it does support OTG.
Yes, but I liked Google Duo more for video calling on Moto Z2 Play. Try it.
Yes, Moto Z2 Play does have support for NFC.
Standard packaging includes Mobile Phone with in-built battery, FREE Style Mod, USB Type C Cable, USB Power Adapter, SIM Ejector Tool, User Manual and a pair of Headphone.