Enhanced Network for Streaming OTT Services

I want to discuss a closed-loop network environment for an Over-The-Top (OTT) service on an ONT/OLT network that avoids internet usage, you need to design a private network where all OTT-related traffic stays within the telecom operator's internal infrastructure. The goal is to ensure that no traffic is routed over the public internet while maintaining a secure and high-performance environment.

We need to discuss the network flow only.