[klyrs]

https://en.m.wikipedia.org/wiki/Video_relay_service

Deaf people were using video to communicate over long distances way before most of us were even aware that was possible. A lot of thought and engineering went into these systems, to make them responsive enough for real time communication. Unfortunately, that technology is being phased out in favor of inferior tech that works over IP. Due to the nature of the protocol, it's quite bad for real time communication -- hearing people are generally satisfied with Zoom because they're using it for audio and a low quality / high latency video feed is tolerable.