[fulafel]

Some history reminders.

Internet video conferencing: we used to have multicast and realtime videoconferencing in the 90s: https://ee.lbl.gov/vic/

Before that we had analog videoconferencing, eg AT&T Picturephone service went GA in 1970.

[vr000m]

Unfortunately modern routers made multicast unrounable, otherwise, we’d all be using mbone

[fulafel]

Mbone was tunneled, and expanded to native IP multicast to save bandwidth in networks that supported it. Meanwhile current networks use multicast (non routed, granted) all the time for eg service discovery and lower level stuff like finding the MAC address corresponding to a IP address.