Are Nexus good phones for video calls?
Natively no. They don't come with native video call software like Samsung and Apple do.
It used to be Hangouts but that app is a mess of options, even if powerful and great. Hangouts is now marketed for enterprise use.
Download DUO on an Android phone and you'll have a super simple app that is designed to do two things:
Make and receive video calls. (Default)
Make and receive audio only calls.
It's a google app.
It's also very data friendly and does well over slower connections.
I recommend it.
I don't know what you mean by that but I'll just answer it anyway. Yes it is a good phone for video calls as any other smartphone. The Nexus 6P is a really capable phone with an impressive rear. Amera and front camera too so yeah it can take video calls with ease