The video appears to imply that the app has operators that are transcribing police scanner activity into app reports, I don't believe there is any non-public info being accessed or govt partnership here or else I would think it would be advertised. Can someone confirm if this implication is correct?

I always had the idea that more and more NYC police radios are being trunked and encrypted in ways that the public can no longer access, does anyone know if this is the case?

I don't know about NYC specifically, but that is generally the case across the country (I'm a paramedic and ham radio operator).