It usually manifests as gamers asking about "strict NAT": https://support.xbox.com/en-US/help/hardware-network/connect-network/xbox-one-nat-error https://suppo

It usually manifests as gamers asking about "strict NAT": https://support.xbox.com/en-US/help/hardware-network/connect-network/xbox-one-nat-error https://support.xbox.com/en-US/help/hardware-network/connect... https://kb.netgear.com/19844/Why-does-my-Xbox-say-NAT-is-set-to-strict-or-moderate-when-I-try-to-play-online https://kb.netgear.com/19844/Why-does-my-Xbox-say-NAT-is-set... Part of why video chat quality sucks is because the RTP traffic has to be sent through a proxy to deal with NAT, doubling load on the Internet and increasing latency.